Tuning the electrocatalytic activity of Pt by structurally ordered PdFe/C for the hydrogen oxidation reaction in alkaline media
- Huazhong Univ. of Science and Technology, Wuhan (China). Key Lab. of Material Chemistry for Energy Conversion and Storage, Hubei Key Lab. of Material Chemistry and Service Failure and School of Chemistry and Chemical Engineering
- Hong Kong Polytechnic Univ., Hong Kong (China). Dept. of Applied Physics
- Huazhong Univ. of Science and Technology, Wuhan (China). School of Physics
- Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Tuning the hydrogen adsorption energy (EH) by controlling the surface electronic structure of Pt is essential for enhancing the hydrogen oxidation reaction (HOR) performance in alkaline media. This could be achieved by forming a Pt skin on PdFe/C nanoparticles with structurally ordered intermetallic (O-PdFe@Pt/C) or disordered alloy (D-PdFe@Pt/C). The HOR activity on O-PdFe@Pt/C exhibits an exchange current density of 1.49 A mgPt-1, which is 3.87 and 7.56 times higher than that on D-PdFe@Pt/C (0.385 A mgPt-1) and Pt/C (0.197 A mgPt-1), respectively. The excellent electrocatalytic HOR performance on O-PdFe@Pt/C can be ascribed to the attenuation of EH on the Pt shell induced by the structurally ordered PdFe core, where the EH on O-PdFe@Pt surface is 0.18 eV smaller than that on Pt according to DFT calculations.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Natural Science Foundation of China (NSFC); 1000 Talents Program (China)
- Grant/Contract Number:
- SC0012704; 21573083; 2017KFYXJJ164; 25301617; 1-ZE6G; AC02-98CH10886
- OSTI ID:
- 1464106
- Report Number(s):
- BNL-207956-2018-JAAM; JMCAET
- Journal Information:
- Journal of Materials Chemistry. A, Vol. 6, Issue 24; ISSN 2050-7488
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Bimetallic Pd 96 Fe 4 nanodendrites embedded in graphitic carbon nanosheets as highly efficient anode electrocatalysts
|
journal | January 2019 |
Facile synthesis of PdFe alloy tetrahedrons for boosting electrocatalytic properties towards formic acid oxidation
|
journal | January 2019 |
Tuning the electronic structure of PtRu bimetallic nanoparticles for promoting the hydrogen oxidation reaction in alkaline media
|
journal | January 2019 |
Similar Records
Enhanced Electrocatalytic Hydrogen Evolution Activity in Single-Atom Pt-Decorated VS2 Nanosheets
Preparation and Characterization of PdFe Nanoleaves as Electrocatalysts for Oxygen Reduction Reaction