Ex-situ flame co-doping of tin and tungsten ions in TiO2 nanorod arrays for synergistic promotion of solar water splitting
Ex-situ flame co-doping of tin and tungsten ions in TiO2 nanorod arrays for synergistic promotion of solar water splitting
复制标题
TiO2纳米棒阵列中锡和钨离子的异位火焰共掺杂协同促进太阳能水分解
DOI:
10.1016/j.ces.2020.115843
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发表时间:
2020-06
影响因子:
4.7
通讯作者:
Weidong Shi
中科院分区:
文献类型:
--
作者:
Biyi Chen;Baoxin Ge;Shimeng Fu;Qi Li;Xue Chen;Longhua Li;Jian Wang;Zhidong Yang;Jinrui Ding;Weiqiang Fan;Baodong Mao;Weidong Shi
Ex-situdoping has an obvious advantage in tailoring the intrinsic properties of semiconductor due to the crucial dopant depth-control. However, the developedex-situdoping technologies encounter dilemmas of high cost and low yield. Herein, we report an efficient, facile and depth-controllableex-situflame doping and the TiO2nanorod arrays, dopants of Sn and W ions are prototypical system for photoelectrochemical water splitting, in which the dopants are diffused quickly into the outer surface region of the TiO2in less than 30 s. The characterizations and theoretical calculations reveal that the enhanced electron localization on coordinatively unsaturated W atoms is induced by adjacent Sn atoms, which not only facilitate to absorb H2O molecules but also diminish activation energy barrier through stabilizing the *OH intermediates during oxygen evolution reaction. The desirableex-situflame doping strategy exhibits great versatility in the configuration of efficient photoelectrochemical systems over prevalent metal-oxide semiconductors.
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