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Title: Ultrasmall amorphous zirconia nanoparticles catalyse polyolefin hydrogenolysis

Journal Article · · Nature Catalysis
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [3];  [4];  [5];  [1];  [6]; ORCiD logo [6];  [1];  [7];  [1];  [1]; ORCiD logo [8]; ORCiD logo [9]; ORCiD logo [7];  [3]; ORCiD logo [4]; ORCiD logo [2] more »;  [10]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1] « less
  1. Ames Lab., and Iowa State Univ., Ames, IA (United States)
  2. Univ. of South Carolina, Columbia, SC (United States)
  3. Univ. of Illinois at Urbana-Champaign, IL (United States)
  4. Northwestern Univ., Evanston, IL (United States)
  5. Northern Illinois Univ., DeKalb, IL (United States)
  6. Univ. of Florida, Gainesville, FL (United States)
  7. Argonne National Lab. (ANL), Argonne, IL (United States)
  8. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
  9. Northern Illinois Univ., DeKalb, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  10. Univ. of Florida, Gainesville, FL (United States). National High Magnetic Field Lab. (MagLab)

Carbon–carbon bond cleavage reactions, adapted to deconstruct aliphatic hydrocarbon polymers and recover the intrinsic energy and carbon value in plastic waste, have typically been catalysed by metal nanoparticles or air-sensitive organometallics. Metal oxides that serve as supports for these catalysts are typically considered to be inert. Here we show that Earth-abundant, non-reducible zirconia catalyses the hydrogenolysis of polyolefins with activity rivalling that of precious metal nanoparticles. To harness this unusual reactivity, our catalytic architecture localizes ultrasmall amorphous zirconia nanoparticles between two fused platelets of mesoporous silica. Macromolecules translocate from bulk through radial mesopores to the highly active zirconia particles, where the chains undergo selective hydrogenolytic cleavage into a narrow, C18-centred distribution. Calculations indicated that C–H bond heterolysis across a Zr–O bond of a Zr(O)2 adatom model for unsaturated surface sites gives a zirconium hydrocarbyl, which cleaves a C–C bond via β-alkyl elimination.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)
Grant/Contract Number:
AC02-07CH11358; AC02-06CH11357; AC02-05CH11231
OSTI ID:
1959193
Alternate ID(s):
OSTI ID: 2283551
Report Number(s):
IS-J--11,001; {"","Journal ID: ISSN 2520-1158"}
Journal Information:
Nature Catalysis, Journal Name: Nature Catalysis Journal Issue: 2 Vol. 6; ISSN 2520-1158
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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