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Design of Pd-Pb Catalysts for Glycerol and Ethylene Glycol Electrooxidation in Alkaline Medium

Journal Article · · Electrocatalysis
 [1];  [2];  [3];  [3];  [3];  [4];  [5];  [3]
  1. Univ. of New Mexico, Albuquerque, NM (United States). Chemical and Nuclear Engineering Dept., UNM Center for Emerging Energy Technologies; Univ. Savoie Mont Blanc LEPMI, Grenoble (France). Univ. Grenoble Alpes, CNRS, Inst. of Engineering
  2. Univ. of New Mexico, Albuquerque, NM (United States). Chemical and Nuclear Engineering Dept., UNM Center for Emerging Energy Technologies; Pajarito Powder LLC, Albuquerque, NM (United States)
  3. Univ. of New Mexico, Albuquerque, NM (United States). Chemical and Nuclear Engineering Dept., UNM Center for Emerging Energy Technologies
  4. Univ. Savoie Mont Blanc LEPMI, Grenoble (France). Univ. Grenoble Alpes, CNRS, Inst. of Engineering; French Univ. Inst., Paris (France)
  5. Univ. Savoie Mont Blanc LEPMI, Grenoble (France). Univ. Grenoble Alpes, CNRS, Inst. of Engineering

Unsupported PdxPb1-x electrocatalysts were synthesized by a modified sacrificial support method (SSM) and thoroughly characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Their electrochemical activity was evaluated for the electrooxidation reactions of ethylene glycol (EGOR) and glycerol (GOR) in alkaline electrolytes, reaching an onset of - 510 mV vs. the normal hydrogen electrode (NHE) for the EGOR and the GOR vs. - 430 mV vs. NHE for the EGOR and the GOR on the Pd-black. Additional mechanistic insights were provided by DFT calculations, showing that the presence of Pb resulted in a stronger binding of the OHads, therefore explaining the enhanced kinetics for the electrooxidation of C2 (ethylene glycol) and C3 (glycerol) alcohol in this environment.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI ID:
1543499
Journal Information:
Electrocatalysis, Vol. 9, Issue 4; ISSN 1868-2529
Publisher:
Springer
Country of Publication:
United States
Language:
English

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