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1. (WO2018036183) CATALYST FOR WATER DECOMPOSITION, PREPARATION METHOD THEREFOR AND USE THEREOF

Pub. No.:    WO/2018/036183    International Application No.:    PCT/CN2017/081649
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Tue Apr 25 01:59:59 CEST 2017
IPC: B01J 23/78
B01J 23/835
B01J 27/185
C01B 3/04
C01B 13/02
C25B 1/04
Applicants: PEKING UNIVERSITY SHENZHEN GRADUATE SCHOOL
北京大学深圳研究生院
Inventors: PAN, Feng
潘锋
YANG, Jinlong
杨金龙
ZHENG, Jiaxin
郑家新
XU, Ming
许明
XIAO, Yinguo
肖荫果
PENG, Haowei
彭浩为
YAN, Chaoyi
闫朝一
MEI, Zongwei
梅宗维
YANG, Luyi
杨卢奕
Title: CATALYST FOR WATER DECOMPOSITION, PREPARATION METHOD THEREFOR AND USE THEREOF
Abstract:
A catalyst for water decomposition, a preparation method therefor and use thereof. The catalyst for water decomposition is at least one of Li2MSiO4, Li2MTiO4, Li2MGeO4, Li2MSnO4 or Na2MP2O7 which comprise tetrahedral structures in crystals thereof, M being a transition metal. During the catalytic water decomposition, as Li or Na ions are discharged, the crystal structures are structurally rotated or rearranged, such that hydroxyl groups or water molecules absorbed by two adjacent transition metals on the surfaces of the crystals form short hydrogen bonds. Thus, the potential energy for breaking the hydrogen bonds is reduced and O-H bonds can be broken using lower energy; and the transfer of protons is promoted, such that the protons on the surfaces of the crystals can be transferred more quickly. The catalyst reduces the overpotential during water decomposition and increases the catalytic efficiency by forming a unique low energy barrier and double-center catalytic process on the surfaces of crystals.