质子
锰
化学
动力学
质子输运
电化学
氢键
无机化学
催化作用
光化学
分子
物理化学
电极
有机化学
物理
量子力学
作者
Shuhua Yang,Xialiang Li,Yifan Li,Yabo Wang,Xiaotong Jin,Lingshuang Qin,Wei Zhang,Rui Cao
标识
DOI:10.1002/anie.202215594
摘要
Abstract The effect of proton transfer on water oxidation has hardly been measurably established in heterogeneous electrocatalysts. Herein, two isomorphous manganese phosphates (NH 4 MnPO 4 ⋅ H 2 O and KMnPO 4 ⋅ H 2 O) were designed to form an ideal platform to study the effect of proton transfer on water oxidation. The hydrogen‐bonding network in NH 4 MnPO 4 ⋅ H 2 O has been proven to be solely responsible for its better activity. The differences of the proton transfer kinetics in the two materials indicate a fast proton hopping transfer process with a low activation energy in NH 4 MnPO 4 ⋅ H 2 O. In addition, the hydrogen‐bonding network can effectively promote the proton transfer between adjacent Mn sites and further stabilize the Mn III −OH intermediates. The faster proton transfer results in a higher proportion of zeroth‐order in [H + ] for OER. Thus, proton transfer‐affected electrocatalytic water oxidation has been measurably observed to bring detailed insights into the mechanism of water oxidation.
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