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Title: Coupled s-p-d Exchange in Facet-Controlled Pd 3 Pb Tripods Enhances Oxygen Reduction Catalysis

Journal Article · · Chem
 [1];  [1];  [1];  [1];  [2];  [1];  [3];  [3];  [4];  [1];  [3];  [2];  [1]
  1. Soochow Univ., Jiangsu (China)
  2. Peking Univ., Beijing (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Hong Kong Polytechnic Univ. (China)

Efficient oxygen reduction reaction (ORR) catalysts are the key in developing high-performance fuel cells. Palladium (Pd) is a promising catalyst system for ORR with its potential to replace platinum (Pt), however it usually exhibits lower activity than Pt. Herein, we report a class of ordered Pd3Pb tripods (TPs) with dominated {110} facets that show extremely high ORR performance in alkaline medium. Totally different from the well-known knowledge that excellent ORR activity of Pt catalyst is caused by its partially-filled d-orbital, our first principle calculations suggest that the strong charge exchange between Pd-4d and Pb-(sp) orbitals on Pd3Pb TPs {110} facet results in the Pd-Pb local bonding unit with the orbital configuration similar to Pt. Consequently, the Pd3Pb TPs exhibit much higher ORR activities than commercial Pt/C and commercial Pd/C. The Pd3Pb TPs are rather endurable and sustain over 20,000 potential cycles with negligible structural and compositional changes.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1548781
Alternate ID(s):
OSTI ID: 1425055
Report Number(s):
BNL-200056-2018-JAAM
Journal Information:
Chem, Vol. 4, Issue 2; ISSN 2451-9294
Publisher:
Cell Press, ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 88 works
Citation information provided by
Web of Science

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Cited By (11)

Metal–nonmetal nanoarchitectures: quaternary PtPdNiP mesoporous nanospheres for enhanced oxygen reduction electrocatalysis journal January 2019
Locally-ordered PtNiPb ternary nano-pompons as efficient bifunctional oxygen reduction and methanol oxidation catalysts journal January 2019
Hyperbranched PdRu nanospine assemblies: an efficient electrocatalyst for formic acid oxidation journal January 2018
Recent Progress of Metal Carbides Encapsulated in Carbon‐Based Materials for Electrocatalysis of Oxygen Reduction Reaction journal November 2019
Ligand‐Sharing‐Mediated Synthesis of Intermetallic FeM Clusters Embedded in Ultrathin γ‐Fe 2 O 3 Nanosheets journal November 2019
Tunable synthesis of multiply twinned intermetallic Pd 3 Pb nanowire networks toward efficient N 2 to NH 3 conversion journal January 2019
Boron‐Doped PdCuAu Nanospine Assembly as an Efficient Electrocatalyst toward Formic Acid Oxidation journal February 2020
Electrocatalytic Activities towards the Electrochemical Oxidation of Formic Acid and Oxygen Reduction Reactions over Bimetallic, Trimetallic and Core–Shell-Structured Pd-Based Materials journal March 2019
Direct fabrication of bi-metallic PdRu nanorod assemblies for electrochemical ammonia synthesis journal January 2019
Trimetallic PdCuIr with long-spined sea-urchin-like morphology for ambient electroreduction of nitrogen to ammonia journal January 2019
Direct fabrication of bimetallic AuPt nanobrick spherical nanoarchitectonics for the oxygen reduction reaction journal January 2019

Figures / Tables (4)