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Yttrium-Induced Regulation of Electron Density in NiFe Layered Double Hydroxides Yields Stable Solar Water Splitting
ACS Catalysis ( IF 12.9 ) Pub Date : 2020-09-04 , DOI: 10.1021/acscatal.0c03272
Dan He 1 , Rui-Ting Gao 1 , Shujie Liu 1 , Mao Sun 1 , Xianhu Liu 2 , Kan Hu 1 , Yiguo Su 1 , Lei Wang 1
Affiliation  

In situ catalyst regeneration of NiFe-based oxygen evolution catalyst (OEC) has been recognized as one of the best approaches for photocorrosion inhibition on water splitting photoelectrodes. However, it generally suffers from laborious multistep procedures to obtain a controllable film. Herein, we use an electron density modulation to synthesize a stable NiFeY layered double hydroxide (LDH) OEC and then deposit this OEC on BiVO4 as photoanodes. The incorporation of Y modifies the chemical environment of Ni and reduces the bandgap of NiFe LDH, enhancing the electrocatalytic/photoelectrochemical performance. Importantly, Y insertion in NiFe LDH remarkably reduces the surface recombination of the BiVO4/cocatalyst system, thereby establishing a much high stability to the photocatalyst than in conventional NiFe OEC/BiVO4 approaches.

中文翻译:

钇诱导的镍铁层状双氢氧化物中电子密度的调节可稳定地分解太阳能

基于NiFe的析氧催化剂(OEC)的原位催化剂再生已被认为是抑制水裂解光电极上光腐蚀的最佳方法之一。但是,为了获得可控制的膜,通常要进行费力的多步骤程序。在这里,我们使用电子密度调制来合成稳定的NiFeY层状双氢氧化物(LDH)OEC,然后将该OEC作为光阳极沉积在BiVO 4上。Y的引入改变了Ni的化学环境并减小了NiFe LDH的带隙,从而增强了电催化/光电化学性能。重要的是,在NiFe LDH中插入Y会显着降低BiVO 4的表面重组/助催化剂体系,从而与常规NiFe OEC / BiVO 4方法相比,对光催化剂具有很高的稳定性。
更新日期:2020-09-20
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