Reduced interfacial tension on ultrathin NiCr-LDH nanosheet arrays for efficient electrocatalytic water oxidation
Reduced interfacial tension on ultrathin NiCr-LDH nanosheet arrays for efficient electrocatalytic water oxidation
复制标题
降低超薄 NiCr-LDH 纳米片阵列的界面张力,实现高效电催化水氧化
DOI:
10.1039/d1ta03863j
复制
发表时间:
2021-06
影响因子:
11.9
通讯作者:
Wei Shiqiang
中科院分区:
文献类型:
--
作者:
Zhang Xiuxiu;Sun Xuan;Li Yuanli;Hu Fengchun;Xu Yanzhi;Tian Jie;Zhang Hui;Liu Qinghua;Su Hui;Wei Shiqiang
Reducing the solid-liquid interfacial tension plays an important role in the realization of highly-efficient and stable electrocatalysis. Herein, we present a facile two-step hydrothermal method for the synthesis of ultrathin atomic-vacancy-confined NiCr-layered double hydroxide (LDH) nanosheets arrays (NiCr-LDH NSAs) to reduce the solid-liquid interfacial tension, which leads to a superior surface hydrophilicity and an extremely exposed catalytic active surface for highly-efficient water oxidation. The as-designed NiCr-LDH NSAs displays an unexceptionable static contact angle of 17°, which corresponds to a significant reduction of 50% compared to that of NiCr-LDH (33°). As a result, the NiCr-LDH NSAs exhibits an ultra-low overpotential (η) of 182 mV at 20 mA cm-2 and a high mass activity of 317.0 A gNi-1 at η = 316 mV (200 mA cm-2), which is 20 times that of RuO2. By using X-ray absorption fine structure and operando synchrotron radiation infrared spectroscopies, we observe in experiment that the NiCr-LDH NSAs owns numerous coordination-unsaturated NiO6-x active centers, which contributes to the effective adsorption of hydroxyl groups to form the key *OOH intermediates and then accelerates the four-electron reaction kinetics.
登录
查看更多内容
影响因子:
--
作者:
Ying-Hsi Pan;Yanfang Wu;H. Hsain;R. Su;C. Cazorla;Dewei Chu
通讯作者:
Ying-Hsi Pan;Yanfang Wu;H. Hsain;R. Su;C. Cazorla;Dewei Chu
影响因子:
6.7
作者:
Ye Wen;Fang Xiaoyu;Chen Xuebo;Yan Dongpeng
通讯作者:
Yan Dongpeng
影响因子:
16.6
作者:
He, Kai;Tsega, Tsegaye Tadesse;Qian, Xuefeng
通讯作者:
Qian, Xuefeng
影响因子:
15
作者:
Su, Hui;Zhou, Wanlin;Liu, Qinghua
通讯作者:
Liu, Qinghua
影响因子:
56.9
作者:
Seitz, Linsey C.;Dickens, Colin F.;Jaramillo, Thomas F.
通讯作者:
Jaramillo, Thomas F.