Title: Roles of Cu+ and Cu0 sites in liquid-phase hydrogenation of esters on core-shell CuZnx@C catalysts

Journal Article · · Applied Catalysis B: Environmental
 [1];  [1]; ORCiD logo [2];  [3];  [3];  [4];  [1]; ORCiD logo [5]; ORCiD logo [1];  [1]; ORCiD logo [6]
  1. Tianjin Univ. (China)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Inst. for Integrated Catalysis
  3. Hebei Univ. of Technology, Tianjin (China)
  4. Louisiana Tech Univ., Ruston, LA (United States)
  5. Tianjin Univ. (China); Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Inst. for Integrated Catalysis
  6. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Inst. for Integrated Catalysis; Technische Univ. Munchen, Garching (Germany)

Liquid-phase hydrogenolytic reduction of esters on Cu-based catalysts is a promising approach for synthesis of alcohols. Here, in this work, core-shell CuZnx@C materials synthesized via pyrolysis of a Zn(NO3)2-loaded metal-organic framework (MOF) were proposed, in which well-defined spacing between Cu species in the parent MOF and the homogeneous loading of a Zn salt leads to an ideal distribution and strong interaction of Cu and Zn after pyrolysis of the precursor. The as-synthesized CuZnx@C showed a much higher catalytic activity than Cu@C. This higher activity is tentatively attributed to the simultaneous presence of Cu0 and Cu+ sites at ZnO crystal domains. The resulting Cu-O-Zn sites have a high tendency to adsorb the ester in the form of a surface bound species that greatly improves the hydrogenolysis, which is the rate controlling step in the reductive pathway. A theoretical study confirms the ability of this site to bind and catalytically convert fatty acid esters.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
China Scholarship Council (CSC); National Natural Science Foundation of China (NSFC); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1599412
Report Number(s):
PNNL-SA-149387
Journal Information:
Applied Catalysis B: Environmental, Journal Name: Applied Catalysis B: Environmental Journal Issue: C Vol. 267; ISSN 0926-3373
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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