Author Archives: Carl Menning

Structure Activity Relationships in Homogeneous Catalysis

Meeting Program — September 2017

Thomas Colacot
Thomas Cola­cot
Tech­ni­cal Fel­low & Glob­al R & D Man­ag­er
John­son Matthey


Abstract — Homo­ge­neous catal­y­sis is a mol­e­c­u­lar phe­nom­e­non, where the struc­ture of the cat­a­lyst plays a sig­nif­i­cant role on the activ­i­ty and selec­tiv­i­ty of a cat­alyt­ic reac­tion. Three cas­es stud­ies will be dis­cussed dur­ing the talk to explain the phe­nom­e­na. The top­ics are

  1. High puri­ty pal­la­di­um acetate vs com­mer­cial in organ­ic syn­the­sis
  2. Ir pre cat­a­lysts for C-H acti­vat­ed bory­la­tion
  3. Gen­er­a­tion of L1Pd(0) cat­a­lysts for advanced cross cou­pling.


  • Book: New Trends in Cross Cou­pling: The­o­ry and Appli­ca­tions, ed. Thomas J. Cola­cot, Roy­al Soci­ety of Chem­istry, Cam­bridge, UK, 2015. ISBN: 978–1-84973–896-5
  • Carin C. C. Johans­son Seechurn, Thomas Sperg­er, There­sa. G. Scrase, Franziska. Schoenebeck and Thomas. J. Cola­cot*, J. Am. Chem. Soc., 2017 (DOI: 10.1021/jacs.7b01110). This work was fea­tured in the April 5 th issue of C & EN. Please see: http://​acsmeet​ings​.cen​mag​.org/​c​h​e​m​i​s​t​s​-​g​e​t​-​b​e​t​t​e​r​-​a​c​q​u​a​i​n​t​e​d​-​w​i​t​h​-​p​a​l​l​a​d​i​u​m​-​c​a​t​a​l​y​s​ts/
  • William A. Car­ole and Thomas J. Cola­cot* Chem. Eur. J, 2016, 22, 7686 (with jour­nal cov­er graph­ics – this work was fea­tured in C & EN. page 20, May 2 nd, 2016)
  • Peter G. Gild­ner, Andrew DeAn­ge­lis, and Thomas J. Cola­cot*, Org. Lett., 2016, 18 (6), 1442–1445 DOI: 10.1021/acs.orglett.6b0037
  • William A. Car­ole, Jonathan Bradley, Mis­bah Sar­war and Thomas J. Cola­cot* Org. Lett., 2015, 17 (21), 5472–5475. DOI: 10.1021/acs.orglett. 5b02835
  • Thomas. J. Cola­cot, Angew Chem. Int. Ed. 2016, 54, 15611–15612.
  • Peter G. Gild­ner and Thomas J. Cola­cot* Organometallics, 2015, 34 (23), 5497–5508. DOI: 10.1021/acs.organomet.5b00567
  • Andrew J. DeAn­ge­lis , Peter G. Gild­ner , Ruis­han Chow , and Thomas J. Cola­cot* J. Org. Chem., 2015, 80 (13), pp 6794–6813, DOI: 10.1021/acs.joc.5b01005
  • Carin C. C. Johans­son Seechurn, Vil­vanathan Sivaku­mar, Deep­ak Satoskar and Thomas J. Cola­cot*, Organometallics, 2014, 33, 3514−3522.

Biog­ra­phy — Dr. Thomas J. Cola­cot received his Ph.D. in Chem­istry from IIT Madras in 1989, fol­low­ing a B.Sc. and M.Sc. in Chem­istry from the Uni­ver­si­ty of Ker­ala in 1981 and 1983, respec­tive­ly. After his doc­tor­al and post-doc­tor­al stud­ies in the US, Dr. Cola­cot went on to pur­sue an edu­ca­tion in man­age­ment, acquir­ing an MBA from Penn­syl­va­nia State Uni­ver­si­ty in 2005, while work­ing at John­son Matthey. Before join­ing John­son Matthey in 1995, Dr. Cola­cot had also worked as a Research Asso­ciate South­ern Methodist Uni­ver­si­ty (TX, USA) on a project fund­ed by Advanced Tech­nol­o­gy Pro­gram, as an Assis­tant Pro­fes­sor at Flori­da A&M Uni­ver­si­ty, and as a Post-Doc­tor­al/Teach­ing Fel­low at Uni­ver­si­ty of Alaba­ma. Hav­ing climbed up the ranks from Devel­op­ment Asso­ciate (bench chemist), Dr. Cola­cot is cur­rent­ly the Tech­ni­cal Fel­low at John­son Matthey, USA, the high­est tech­ni­cal rank for a sci­en­tist with reports from dif­fer­ent parts of the world.

As a researcher, Dr. Cola­cot has focused on many areas of homoge­nous catal­y­sis, par­tic­u­lar­ly becom­ing pro­fi­cient in pal­la­di­um-cat­alyzed cross-cou­pling. He also has exten­sive expe­ri­ence in organometal­lic and organ­ic syn­the­ses, and in process chem­istry. His work is reflect­ed in sev­er­al patents to his name, more than one hun­dred peer-reviewed pub­li­ca­tions, and numer­ous invit­ed lec­tures and sem­i­nars span­ning India, USA, Chi­na, and Europe. His recent­ly edit­ed book: New Trends in Cross Cou­pling: The­o­ry and Appli­ca­tions by the Roy­al Soci­ety of Chem­istry is wide­ly used in acad­e­mia and indus­try. Through his work, Dr. Cola­cot is cred­it­ed with being a lead­ing influ­ence in devel­op­ing excep­tion­al cat­alyt­ic sys­tems for the advance­ment of met­al-cat­alyzed syn­thet­ic organ­ic chem­istry for real world appli­ca­tions such as drug devel­op­ment, OLED’s/liquid crys­tals and agri­cul­ture. His empha­sis in design­ing cat­a­lysts and cat­alyt­ic process­es has been on their applic­a­bil­i­ty in indus­tri­al set­tings, par­tic­u­lar­ly per­tain­ing to agri­cul­ture, elec­tron­ics and med­i­cine. He is the finest exam­ple of a link between acad­e­mia and indus­try.

Dr. Colacot’s con­tri­bu­tions to the field have result­ed in many awards and acco­lades, amongst them the recent pres­ti­gious IIT Madras 2016 Dis­tin­guished Alum­nus Award for Tech­nol­o­gy Inno­va­tions and Chem­i­cal Research Soci­ety of India (2016 CRSI) Medal for out­stand­ing con­tri­bu­tions in Organometallics and Homo­ge­neous Catal­y­sis. He is the first Indi­an to be award­ed the Amer­i­can Chem­i­cal Soci­ety (ACS) Nation­al Award in Indus­tri­al Chem­istry in 2015. He also received the 2015 IPMI Hen­ry Alfred Award (2015) from the Inter­na­tion­al Pre­cious Met­al Insti­tute, spon­sored by the BASF. In 2014 he received the Indi­an Amer­i­can Ker­ala Cul­ture and Civic Cen­ter Award for his out­stand­ing con­tri­bu­tions in Applied Sci­ences. In addi­tion, he received Roy­al Soci­ety of Chem­istry 2012 Applied Catal­y­sis Award and Medal. He is also a Fel­low of the Roy­al Soci­ety of Chem­istry, UK.

2017 Spring Symposium

8:00 AMReg­is­tra­tion / Break­fast
8:55 AMOpen­ing Remarks
9:00 AMEmerg­ing Chal­lenges In Catal­y­sis For Sus­tain­able Pro­duc­tion Of Trans­port Fuels: An Indus­tri­al View
Dr. John Shabak­er, BP Prod­ucts North Amer­i­ca
Abstract »
9:40 AMSci­ence And Tech­nol­o­gy Of Frame­work Met­al-Con­tain­ing Mol­e­c­u­lar Sieves Cat­a­lysts
Prof. Las­z­lo Nemeth, Uni­ver­si­ty of Neva­da, Las Vegas
Abstract »
10:20 AMCof­fee Break
10:40 AMSyn­the­sis Of Zin­cosil­i­cate Cat­a­lysts For The Oligomer­iza­tion Of Propy­lene
Dr. Mark Deimund, Exxon­Mo­bil Research and Engi­neer­ing Com­pa­ny
Abstract »
11:20 AMZeo­lite Catal­y­sis With A Focus on Down­stream Refin­ing Appli­ca­tions
Dr. C.Y. Chen, Chevron Ener­gy Tech­nol­o­gy Com­pa­ny
Abstract »
12:00 PMLunch
1:20 PMCon­tin­u­ous Reac­tors For Homo­ge­neous Catal­y­sis In Phar­ma­ceu­ti­cal Man­u­fac­tur­ing
Dr. Mar­tin John­son, Eli Lil­ly and Com­pa­ny
Abstract »
2:00 PMMech­a­nisms And Mate­ri­als For Alka­line Hydro­gen Elec­tro­catal­y­sis
Prof. Mau­reen Tang, Drex­el Uni­ver­si­ty
Abstract »
2:40 PM Award Announce­ment
2:55 PMCof­fee Break
3:15 PMPro­duc­tion Of para-Methyl­styrene And para-Divinyl­ben­zene From Furan­ic Com­pounds
Mau­ra Koehle, Uni­ver­si­ty of Delaware (Stu­dent Poster Award Speak­er)
Abstract »
3:35 PMDesign Of Com­plex Met­al/Met­al-oxide Het­ero­ge­neous Cat­alyt­ic Mate­ri­als For Ener­gy And Chem­i­cal Con­ver­sion
Prof. Eran­da Nikol­la, Wayne State Uni­ver­si­ty
Abstract »
4:15 PMThe Mech­a­nism Of CO2 Reduc­tion Over Pd/Al2O3: A Com­bined Steady State Iso­tope Tran­sient Kinet­ic Analy­sis (SSITKA) And Operan­do FTIR Inves­ti­ga­tion
Dr. János Szanyi, Pacif­ic North­west Nation­al Lab­o­ra­to­ry
Abstract »
4:55 PMClos­ing Remarks
5:00 PMCon­fer­ence Adjourns

2016 Spring Symposium

8:00 AMReg­is­tra­tion / Break­fast
8:50 AMOpen­ing Remarks
9:00 AMSci­ence and Serendip­i­ty in Het­ero­ge­neous Catal­y­sis Research
Ive Her­mans, Uni­ver­si­ty of Wis­con­sin — Madi­son
9:40 AMHydro­gen Spillover to Car­bon Sup­ports: Bridg­ing the Gap Between Exper­i­ment and The­o­ry
Angela Luek­ing, Penn­syl­va­nia State Uni­ver­si­ty
10:20 AMCof­fee Break
10:40 AMDesign and Syn­the­sis of Nanos­truc­tured Car­bide and Nitride Based Cat­a­lysts
Levi Thomp­son, Uni­ver­si­ty of Michi­gan — Ann Arbor
11:20 AMMicrolith Coat­ed Mesh Sub­strates for Process Inten­si­fi­ca­tion
Jef­frey Weiss­man, Pre­ci­sion Com­bus­tion
12:00 PMLunch
1:20 PMCat­alyt­ic Con­ver­sion of Sour Nat­ur­al Gas into Val­ue Added Fuels and Chem­i­cals
Jonas Bal­tru­saitis, Lehigh Uni­ver­si­ty
2:00 PMSerendip­i­tous Dis­cov­ery of a Nano-struc­tured Yttri­um Oxy­chlo­ride Cat­a­lyst for the Selec­tive Dehy­dra­tion of Phe­nol
David Bar­ton, Dow Chem­i­cal Co.
2:40 PMCof­fee Break
3:00 PM Award Announce­ment
3:20 PMSta­bi­liza­tion of Metastable Oxides via Sur­face Mod­i­fi­ca­tion
Daniel Gre­go­ry, Lehigh Uni­ver­si­ty
3:40 PMCon­trol­ling the Al Dis­tri­b­u­tion and Cu Spe­ci­a­tion and Prox­im­i­ty in Cu-SSZ-13 Zeo­lites: Con­se­quences for NOx SCR Catal­y­sis
Raj Gounder, Pur­due Uni­ver­si­ty
4:20 PMClos­ing Remarks
4:30 PMCon­fer­ence Adjourns

2016–2017 Meeting Program

Thurs­day, Sept. 15th, 2016Dion VlachosIn Sil­i­co Pre­dic­tion of Mate­ri­als for Ener­gy Appli­ca­tions
Dion Vla­chos, Uni­ver­si­ty of Delaware — 2016 CCP Award Win­ner
Abstract » | Announce­ment »

Thurs­day, Oct. 27th, 2016Keiichi TomishigeDevel­op­ment of het­ero­ge­neous cat­a­lysts for the pro­duc­tion of bio­mass-derived chem­i­cals by selec­tive C-O hydrogenol­y­sis and deoxy­de­hy­dra­tion
Kei­ichi Tomishige, Tohoku Uni­ver­si­ty
Abstract » | Announce­ment »

Stu­dent Speak­er
Thurs­day, Nov. 10th, 2016Ravindra DattaUnrav­el­ing Cat­alyt­ic Mech­a­nisms and Kinet­ics: Lessons from Elec­tri­cal Net­works
Ravin­dra Dat­ta, Worces­ter Poly­tech­nic Insti­tute
Abstract » | Announce­ment »
Grad­u­ate Stu­dent Poster Ses­sion
Thurs­day, Jan. 19th, 2017Ahmad MoiniCia­pet­ta Award Lec­ture:
Nov­el Zeo­lite Cat­a­lysts for Diesel Emis­sion Appli­ca­tions

Ahmad Moi­ni, BASF
Abstract » | Announce­ment »

Stu­dent Speak­er
Thurs­day, Feb. 16th, 2017Raul LoboBio­mass and Nat­ur­al Gas Val­oriza­tion by Zeo­lite Catal­y­sis
Raul Lobo, Uni­ver­si­ty of Delaware
Abstract »

Stu­dent Speak­er
Offi­cer Nom­i­na­tions
Thurs­day, Mar. 16th, 2017Manuela SerbanPar­al­lel between UOP’s Reform­ing and Dehy­dro­gena­tion Tech­nolo­gies and Cat­a­lysts
Manuela Ser­ban, Hon­ey­well (UOP)
Abstract »
Offi­cer Nom­i­na­tions
Thurs­day, Apr. 20th, 2017Avelino CormaSol­id Cat­a­lysts Design: From Fun­da­men­tal Knowl­edge To Cat­alyt­ic Appli­ca­tion
Aveli­no Cor­ma, Insti­tu­to de Tec­nología Quími­ca
Abstract »  |  Announce­ment »
Offi­cer Elec­tions
May 2017Spring Sym­po­sium
Online Din­ner Reser­va­tion » | Direc­tions to Dou­ble Tree Hotel »

2016–2017 Officers

2016–2017 Officers


Anton Petushkov
Zeolyst Inter­na­tional
Past Chair
Tor­ren Carl­son
Josh Pacheco
Zeolyst Inter­na­tional
Lifeng Wang
Zeolyst Inter­na­tion­al
Dan Slanac
Pro­gram Chair
Ist­van Halasz
Zeolyst Inter­na­tion­al
Arrange­ments Chair
Tzia Ming
Uni­ver­si­ty of Penn­syl­va­nia
Direc­tor Mem­ber­ship
Jacob Dick­in­son
Direc­tor Poster Ses­sion
Eric Sacia
Direc­tor Spon­sor­ship
Thomas Yeh
John­son Matthey
Carl Men­ning
Sen­try Data Sys­tems
Rep­re­sen­ta­tive to NACS
Dion Vla­chos
Uni­ver­si­ty of Delaware

Production of para-methylstyrene and para-divinylbenzene from furanic compounds

2017 Spring Symposium

Mol­ly Koehle and Raul Lobo, Chem­i­cal and Bio­mol­e­c­u­lar Engi­neer­ing, Uni­ver­si­ty of Delaware, Newark, DE

Abstract — Of the three iso­mers of methyl­styrene, para-methyl­styrene is high­ly desir­able because it yields poly­mers with supe­ri­or prop­er­ties over poly­styrene and mixed poly-methyl­styrene [1]. How­ev­er, con­trol­ling the sub­sti­tu­tion of methyl­styrene via direct acy­la­tion or alky­la­tion of toluene is dif­fi­cult because even though the para iso­mer is favored, meta and ortho iso­mers are also formed [1, 2], and sep­a­ra­tion of the iso­mer mix­ture is very dif­fi­cult due to their near­ly iden­ti­cal prop­er­ties.

The Diels-Alder cycload­di­tion and dehy­dra­tion of sub­sti­tut­ed furans with eth­yl­ene is a plau­si­ble route to p-methyl­styrene since it is inher­ent­ly selec­tive to para aro­mat­ic species. We have suc­cess­ful­ly devel­oped a three-step cat­alyt­ic route to p-methyl­styrene from methyl­fu­ran (Scheme 1) at high yield and very high iso­mer selec­tiv­i­ty. The process uses Friedel-Crafts acy­la­tion, selec­tive reduc­tions with hydro­gen and Diels-Alder cycload­di­tion with eth­yl­ene. The raw materials—furans, eth­yl­ene and acetic acid—can all be derived from bio­mass [3,4], thus allow­ing ‘green’ styrene pro­duc­tion from renew­able car­bon sources. This approach has also been extend­ed to the pro­duc­tion of p-divinyl­ben­zene. As the acy­la­tion step is known to be cat­alyzed by Lewis acids, recent work has focused on study­ing this step on Brøn­st­ed and Lewis acid zeo­lites and will be pre­sent­ed as well.

Scheme 1: Pro­duc­tion of para-methyl­styrene from methyl­fu­ran

[1] W.W. Kaed­ing and G.C. Bar­ile, in: B.M. Cul­bert­son and C.U. Pittman, Jr. (Eds.), New Monomers and Poly­mers, Plenum Press, New York, NY, 1984, pp. 223–241.
[2]“Aromatic Sub­sti­tu­tion Reac­tions.” http://​www2​.chem​istry​.msu​.edu/​f​a​c​u​l​t​y​/​r​e​u​s​c​h​/​V​i​r​t​T​x​t​J​m​l​/​b​e​n​z​r​x​1​.​htm
[3] A.A. Rosatel­la; S.P. Sime­onov; R.F.M. Frade, R.F.M..; C.A.M. Afon­so, Green Chem., 13 (2011) 754.
[4] C.H. Chris­tensen; J. Rass-Hansen; C.C. Mars­den; E. Taarn­ing; K. Ege­blad, Chem­SusChem, 1 (2008) 283.

Biog­ra­phy — Mol­ly obtained her B.S. in Chem­i­cal Engi­neer­ing from the Uni­ver­si­ty of Pitts­burgh and her M.S. in Chem­i­cal Engi­neer­ing from the Uni­ver­si­ty of Con­necti­cut. She has worked at the Catal­y­sis Cen­ter for Ener­gy Inno­va­tion in Prof. Raul Lobo’s group since 2013. Her work focus­es on trans­for­ma­tions of bio­mass to fuels and chem­i­cals with Bron­st­ed and Lewis acid zeo­lites.

The mechanism of CO2 reduction over Pd/Al2O3: a combined steady state isotope transient kinetic analysis (SSITKA) and operando FTIR investigation

2017 Spring Symposium

Xiang Wang, Hui Shi and János Szanyi, Insti­tute for Inte­grat­ed Catal­y­sis, Pacif­ic North­west Nation­al Lab­o­ra­to­ry, Rich­land, WA

Abstract — Under­stand­ing the crit­i­cal steps involved in the het­ero­ge­neous cat­alyt­ic CO2 reduc­tion has attract­ed a lot of atten­tion recent­ly. In order to ful­ly under­stand the mech­a­nism of this reac­tion the deter­mi­na­tion of both the rate-deter­min­ing steps and reac­tion inter­me­di­ates are vital. Steady-State Iso­topic Tran­sient Kinet­ic Analy­sis (SSITKA) is one of the most pow­er­ful tech­niques used to inves­ti­gate the ele­men­tary steps under steady-state reac­tion con­di­tions. This tech­nique pro­vides valu­able infor­ma­tion on mean res­i­dent life­time of sur­face inter­me­di­ates, sur­face con­cen­tra­tions of adsorbed reac­tant species and an upper bound of the turnover fre­quen­cy. Cou­pling SSITKA with operan­do-FTIR spec­troscopy allows us to dis­crim­i­nate between active and spec­ta­tor species present on the cat­alyt­ic sur­face under steady state reac­tion con­di­tions.  In the present work operan­do SSITKA exper­i­ments cou­pled with trans­mis­sion FTIR, mass spec­trom­e­try (MS) and gas chro­matog­ra­phy (GC) were per­formed to probe both the chem­i­cal nature and kinet­ics of reac­tive inter­me­di­ates over a Pd-Al2O3 cat­a­lysts and pro­vide a clear mech­a­nis­tic pic­ture of the CO2 hydro­gena­tion reac­tion by reveal­ing the rate-deter­min­ing steps for CH4 and CO pro­duc­tion.

Fig­ure 1 shows nor­mal­ized real-time sig­nals for the decay and increase of methane (a) and car­bon-monox­ide (b) in the efflu­ent at 533 K reac­tion tem­per­a­ture after the feed gas was switched at 0 s from CO2/H2/Ar mix­ture to 13CO2/H2 mix­ture.  With increas­ing tem­per­a­ture, the decay of CH4 and CO get faster.  By inte­gra­tion under the decay curves , the mean sur­face-res­i­dence times CH4 and  CO), the abun­dance of adsorbed sur­face inter­me­di­ates lead­ing to CH4 and CO prod­ucts  CH4 and  CO) at 533–573 K were cal­cu­lat­ed. At low tem­per­a­ture, CO2 metha­na­tion is slow­er than the reverse water-gas shift reac­tion, but became faster as the tem­per­a­ture was increased over 563 K.  The sim­i­lar appar­ent acti­va­tion ener­gies obtained for the hydro­gena­tion of adsorbed CO and for the for­ma­tion of CH4 indi­cates that the hydro­gena­tion of CO is the rate-deter­min­ing step dur­ing the CO2 metha­na­tion reac­tion. More­over, the sim­i­lar appar­ent acti­va­tion ener­gies esti­mat­ed for the con­sump­tion of adsorbed for­mates (FTIR) and for the for­ma­tion of CO (MS), indi­cates that the H-assist­ed decom­po­si­tion of for­mates is the rate deter­min­ing step in the reverse water gas shift reac­tion.  The rate-deter­min­ing step for CO for­ma­tion is the con­ver­sion of adsorbed for­mate, while that for CH4 for­ma­tion is the hydro­gena­tion of adsorbed car­bonyl. The bal­ance of the hydro­gena­tion kinet­ics between adsorbed for­mates and car­bonyls gov­erns the selec­tiv­i­ties to CH4 and CO. We applied this knowl­edge to design cat­a­lysts and achieved high selec­tiv­i­ties to desired prod­ucts. 

Fig­ure 1. Nor­mal­ized response of (a) CH4 and 13CH4 prod­ucts and (b) CO and 13CO prod­ucts as func­tions of time.

Biog­ra­phy — Dr. Szanyi‘s research is focused on sur­face sci­ence, spec­troscopy and kinet­ic stud­ies on het­ero­ge­neous cat­alyt­ic reac­tion sys­tems aimed at under­stand­ing struc­ture-reac­tiv­i­ty rela­tion­ships. In par­tic­u­lar, he is inter­est­ed in under­stand­ing the mech­a­nis­tic con­se­quences of very high (atom­ic) met­al dis­per­sion on dif­fer­ent sup­port mate­ri­als. Using a series of ensem­ble aver­aged spec­troscopy meth­ods he inves­ti­gates the fun­da­men­tal prop­er­ties of met­al atoms and small met­al clus­ters pre­pared under well con­trolled UHV con­di­tions. These results pro­vide infor­ma­tion on the ener­get­ics of the inter­ac­tions between high­ly dis­persed met­als and select­ed probe mol­e­cules. Apply­ing in situ RAIR spec­troscopy they study the bind­ing con­fig­u­ra­tions of adsor­bates to met­als, and iden­ti­fy sur­face species present on the met­al and sup­port mate­ri­als under ele­vat­ed reac­tant pres­sures. Simul­ta­ne­ous­ly, they are con­duct­ing detailed kinet­ics and operan­do spec­troscopy mea­sure­ments on mod­el high sur­face area sup­port­ed met­al cat­a­lysts using flow reac­tors and SSITKA/FTIR/MS tech­niques. These mea­sure­ments pro­vide detailed kinet­ic infor­ma­tion togeth­er with sur­face spe­ci­a­tion that allow them to great­ly enhance our mech­a­nis­tic under­stand­ing of het­ero­ge­neous cat­alyt­ic sys­tems, in par­tic­u­lar the reduc­tion of CO2. Dr Szanyi is also involved in research relat­ed to the fun­da­men­tal under­stand­ing of auto­mo­tive emis­sion con­trol catal­y­sis, con­duct­ing research in selec­tive cat­alyt­ic reduc­tion of NOx on zeo­lite-based cat­a­lysts, low tem­per­a­ture NO and CO oxi­da­tion on met­al oxides, and low tem­per­a­tures NOx and HC stor­age in zeo­lites.