BROWSE

Related Scientist

CINAP's photo.

CINAP
나노구조물리 연구단
more info

ITEM VIEW & DOWNLOAD

Discovering ultrahigh loading of single-metal-atoms via surface tensile-strain for unprecedented urea electrolysis

Cited 0 time in webofscience Cited 0 time in scopus
113 Viewed 0 Downloaded
Title
Discovering ultrahigh loading of single-metal-atoms via surface tensile-strain for unprecedented urea electrolysis
Author(s)
Ashwani Kumar; Xinghui Liu; Jinsun Lee; Debnath, Bharati; Amol R. Jadhav; Xiaodong Shao; Viet Q. Bui; Yosep Hwang; Yang Liu; Kim, Min Gyu; Hyoyoung Lee
Publication Date
2021-12-09
Journal
ENERGY &ENVIRONMENTAL SCIENCE, v.14, no.12, pp.6494 - 9505
Publisher
ROYAL SOC CHEMISTRY
Abstract
© The Royal Society of Chemistry 2021. Single-atom-catalysts (SACs) have recently gained significant attention in energy conversion/storage applications, while the low-loading amount due to their easy-to-migrate tendency causes a major bottleneck. For energy-saving H-2 generation, replacing the sluggish oxygen evolution reaction with the thermodynamically favorable urea oxidation reaction (UOR) offers great promise, additionally mitigating the issue of urea-rich water contamination. However, the lack of efficient catalysts to overcome the intrinsically slow kinetics limits its scalable applications. Herein, we discover that incorporating tensile-strain on the surface of a Co3O4 (strained-Co3O4; S-Co3O4) support by the liquid N-2-quenching method can significantly inhibit the migration tendency of Rh single-atoms (Rh-SA), thereby stabilizing an similar to 200% higher loading of Rh-SA sites (Rh-SA-S-Co3O4; bulk loading similar to 6.6 wt%/surface loading similar to 11.6 wt%) compared to pristine-Co3O4 (P-Co3O4). Theoretical calculations revealed a significantly increased migration energy barrier of Rh-SA on the S-Co3O4 surface than on P-Co3O4, inhibiting their migration/agglomeration. Surprisingly, Rh-SA-S-Co3O4 exhibited exceptional pH-universal UOR activity, requiring record-low working potentials and surpassing Pt/Rh-C, this was due to superior urea adsorption and stabilization of CO*/NH* intermediates, revealed by DFT simulations. Meanwhile, the assembled urea-electrolyzer delivered 10 mA cm(-2) at only 1.33 V with robust stability in alkaline media. This work provides a general methodology towards high-loading SACs for scalable applications.
URI
https://pr.ibs.re.kr/handle/8788114/11872
DOI
10.1039/d1ee02603h
ISSN
1754-5692
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse