Oxygen-bridged Ni-OC interfaces enrich free water for ampere-level current density hydrogen evolution
Oxygen-bridged Ni-OC interfaces enrich free water for ampere-level current density hydrogen evolution
研究概述
由Ni基MOF热处理获得含丰富Ni–O–C界面的碳负载金属Ni纳米片阵列，调控双电层水结构并促进水解离。析氢在10和2000 mA/cm²下过电位分别15和286 mV；研究表明界面氧桥改变电子态、优化氢吸附并转移限速步骤。
谱图与表征信息
Figure 3 (Color online) High-resolution XPS spectra for (a) Ni 2p, (b) O 1s, and (c) C 1s of Ni@O–C and Ni@C. (d) N 2 adsorption-desorption isotherm curves of Ni-MOF, Ni@O–C, and Ni@C. (e) Ni K-edge XANES and (f) k 2-weighted EXAFS spectra of Ni@O–C, Ni@C, NiO, and Ni foil. WT diagrams of Ni K-edge EXAFS for (g) Ni foil, (h) NiO, (i) Ni@C, and (j) Ni@O–C.