Defective TiO2-x for High-Performance Electrocatalytic NO Reduction toward Ambient NH3 Production

Zixiao Li; Qiang Zhou; Jie Liang; Longcheng Zhang; Xiaoya Fan; Donglin Zhao; Zhengwei Cai; Jun Li; Dongdong Zheng; Xun He; Yongsong Luo; Yan Wang; Binwu Ying; Hong Yan; Shengjun Sun; Jing Zhang; Abdulmohsen Ali Alshehri; Feng Gong; Yinyuan Zheng; Xuping Sun

doi:10.1002/smll.202300291

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Defective TiO2-x for High-Performance Electrocatalytic NO Reduction toward Ambient NH3 Production

Journal article

Peer reviewed

Defective TiO2-x for High-Performance Electrocatalytic NO Reduction toward Ambient NH3 Production

Zixiao Li, Qiang Zhou, Jie Liang, Longcheng Zhang, Xiaoya Fan, Donglin Zhao, Zhengwei Cai, Jun Li, Dongdong Zheng, Xun He, …

Small (Weinheim an der Bergstrasse, Germany), Vol.19(24), pp.e2300291-n/a

01/06/2023

DOI: https://doi.org/10.1002/smll.202300291

PMID: 36919558

Abstract

Chemistry

Chemistry, Multidisciplinary

Chemistry, Physical

Materials Science

Materials Science, Multidisciplinary

Nanoscience & Nanotechnology

Physical Sciences

Physics

Physics, Applied

Physics, Condensed Matter

Science & Technology

Science & Technology - Other Topics

Technology

Synthesis of green ammonia (NH3) via electrolysis of nitric oxide (NO) is extraordinarily sustainable, but multielectron/proton-involved hydrogenation steps as well as low concentrations of NO can lead to poor activities and selectivities of electrocatalysts. Herein, it is reported that oxygen-defective TiO2 nanoarray supported on Ti plate (TiO2-x/TP) behaves as an efficient catalyst for NO reduction to NH3. In 0.2 m phosphate-buffered electrolyte, such TiO2-x/TP shows competitive electrocatalytic NH3 synthesis activity with a maximum NH3 yield of 1233.2 mu g h(-1) cm(-2) and Faradaic efficiency of 92.5%. Density functional theory calculations further thermodynamically faster NO deoxygenation and protonation processes on TiO2-x (101) compared to perfect TiO2 (101). And the low energy barrier of 0.7 eV on TiO2-x (101) for the potential-determining step further highlights the greatly improved intrinsic activity. In addition, a Zn-NO battery is fabricated with TiO2-x/TP and Zn plate to obtain an NH3 yield of 241.7 mu g h(-1) cm(-2) while providing a peak power density of 0.84 mW cm(-2).

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Title: Defective TiO2-x for High-Performance Electrocatalytic NO Reduction toward Ambient NH3 Production
Creators - without role: Zixiao Li - University of Electronic Science and Technology of China
Qiang Zhou - Southeast University
Jie Liang - University of Electronic Science and Technology of China
Longcheng Zhang - University of Electronic Science and Technology of China
Xiaoya Fan - University of Electronic Science and Technology of China
Donglin Zhao - University of Electronic Science and Technology of China
Zhengwei Cai - Shandong Normal University
Jun Li - University of Electronic Science and Technology of China
Dongdong Zheng - University of Electronic Science and Technology of China
Xun He - University of Electronic Science and Technology of China
Yongsong Luo - University of Electronic Science and Technology of China
Yan Wang - University of Electronic Science and Technology of China
Binwu Ying - University of Electronic Science and Technology of China
Hong Yan - University of Electronic Science and Technology of China
Shengjun Sun - Shandong Normal University
Jing Zhang - Chengdu University
Abdulmohsen Ali Alshehri - King Abdulaziz University
Feng Gong - Southeast University
Yinyuan Zheng - Huzhou University
Xuping Sun - University of Electronic Science and Technology of China
Publication Details: Small (Weinheim an der Bergstrasse, Germany), Vol.19(24), pp.e2300291-n/a
Publisher: Wiley
Number of pages: 7
Grant note: 22072015 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC)
Identifiers: 9934172208331
Academic Unit: King Abdulaziz University
Language: English
Resource Type: Journal article