Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/163472
Title: Dense heterointerfaces and unsaturated coordination synergistically accelerate electrocatalysis in Pt/Pt₅P₂ porous nanocages
Authors: Li, Yinghao
Kidkhunthod, Pinit
Zhou, Yingtang
Wang, Xin
Lee, Jong-Min
Keywords: Engineering::Chemical technology
Issue Date: 2022
Source: Li, Y., Kidkhunthod, P., Zhou, Y., Wang, X. & Lee, J. (2022). Dense heterointerfaces and unsaturated coordination synergistically accelerate electrocatalysis in Pt/Pt₅P₂ porous nanocages. Advanced Functional Materials, 32(41), 2205985-. https://dx.doi.org/10.1002/adfm.202205985
Project: G105/19
RG63/21
Journal: Advanced Functional Materials
Abstract: Designing cost-effective and durable Pt-based catalysts is vital and challenging for practicable energy storage and conversion technologies. Here, a fast phosphating strategy to establish a Pt/Pt5P2 porous nanocage with numerous heterointerfaces and defects is presented. It exhibits extraordinary activity and stability for both hydrogen evolution reaction (HER) with a small overpotential of 29 mV at 10 mA cm−2 and methanol oxidation reaction (MOR) with a high mass activity of 1.37 A mg−1Pt at peak values, surpassing Pt/C. Microstructural analyzes show that many stacking faults are induced around heterointerfaces, while rich vacancies and atomic steps are created by the phosphorus-induced thermal migration of Pt atoms, serving as highly active low-coordination sites. X-ray absorption spectroscopy and theoretical calculations reveal that introducing P atoms can modify the electronic configuration of Pt, thus optimizing H2O/H* binding strength and lowering water dissociation energy to accelerate HER, while decreasing the energy barrier of the rate-limiting step (*CHO to *HCOOH) to facilitate MOR.
URI: https://hdl.handle.net/10356/163472
ISSN: 1616-301X
DOI: 10.1002/adfm.202205985
Rights: © 2022 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

SCOPUSTM   
Citations 50

3
Updated on Feb 1, 2023

Web of ScienceTM
Citations 50

2
Updated on Feb 3, 2023

Page view(s)

19
Updated on Feb 7, 2023

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.