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| 1 | 3D printing of metal-based materials for renewable energy applications显示文摘Large-scale renewable energy must overcome conversion and storage challenges before it can replace fossil fuels due to its intermittent nature.However,current sustainable energy devices still suffer from high cost,low efficiency,and poor service life problems.Recently,porous metal-based materials have been widely used as desirable cross-functional platforms for electrochemical and photochemical energy systems for their unique electrical conductivity,catalytic activity,and chemical stability.To tailor the porosity length scale,ordering,and compositions,3D printing has been applied as a disruptive manufacturing revolution to create complex architected components by directly joining sequential layers into designed structures.This article intends to summarize cutting-edge advances of metal-based materials for renewable energy devices(e.g.,fuel cells,solar cells,supercapacitors,and batteries)over the past decade. | Shahryar Mooraj Zhen Qi Cheng Zhu Jie Ren Siyuan Peng Liang Liu Shengbiao Zhang Shuai Feng Fanyue Kong Yanfang Liu Eric B.Duoss Sarah Baker Wen Chen | 2021 | Nano Research2021，14，7： | 1 |
| 2 | Manipulating metal-oxygen local atomic structures in singlejunctional p-Si/WO_(3) photocathodes for efficient solar hydrogen generation显示文摘Self-passivation in aqueous solution and sluggish surface reaction kinetics significantly limit the photoelectrochemical(PEC)performances of silicon-based photoelectrodes.Herein,a WO_(3) thin layer is deposited on the p-Si substrate by pulsed laser deposition(PLD),acting as a photocathode for PEC hydrogen generation.Compared to bare p-Si,the single-junctional p-Si/WO_(3) photoelectrodes exhibit excellent and stable PEC performances with significantly increased cathodic photocurrent density and exceptional anodic shift in onset potential for water reduction.It is revealed that the WO_(3) layer could reduce the charge transfer resistance across the electrode/electrolyte interface by eliminating the effect of Fermi level pinning on the surface of p-Si.More importantly,by varying the oxygen pressures during PLD,the collaborative modulation of W–O bond covalency and WO6 octahedral structure symmetry contributes to the promoted charge carrier transport and separation.Meanwhile,a large band bending at the p-Si/WO_(3) junction,induced by the optimized O vacancy contents in WO_(3),could provide a photovoltage as high as~500 mV to efficiently drive charge transfer to overcome the water reduction overpotential.Synergistically,by manipulating W–O local atomic structures in the deposited WO_(3) layer,a great improvement in PEC performance could be achieved over the singlejunctional p-Si/WO_(3) photocathodes for solar hydrogen generation. | Wu Zhou Chung-Li Dong Yiqing Wang Yu-Cheng Huang Lingyun He Han-Wei Chang Shaohua Shen | 2021 | Nano Research2021，14，7： | 1 |
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