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| 1 | Electrodeposition of Pt-Decorated Ni(OH)_(2)/CeO_(2) Hybrid as Superior Bifunctional Electrocatalyst for Water Splitting显示文摘The facile synthesis of highly active and stable bifunctional electrocatalysts to catalyze water splitting is attractive but challenging.Herein,we report the electrodeposition of Pt-decorated Ni(OH)_(2)/CeO_(2)(PNC)hybrid as an efficient and robust bifunctional electrocatalyst.The graphite-supported PNC catalyst delivers superior hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)activities over the benchmark Pt/C and RuO_(2),respectively.For overall water electrolysis,the PNC hybrid only requires a cell voltage of 1.45V at 10mAcm-2 and sustains over 85 h at 1000mAcm^(-2).The remarkable HER/OER performances are attributed to the superhydrophilicity and multiple effects of PNC,in which Ni(OH)_(2)and CeO_(2)accelerate HER on Pt due to promoted water dissociation and strong electronic interaction,while the electron-pulling Ce cations facilitate the generation of high-valence Ni OER-active species.These results suggest the promising application of PNC for H2 production from water electrolysis. | Huanhuan Liu Zhenhua Yan Xiang Chen Jinhan Li Le Zhang Fangming Liu Guilan Fan Fangyi Cheng | 2020 | Research2020，，1： | 2 |
| 2 | Boosting Electrocatalytic Oxygen Evolution by Cation Defect Modulation via Electrochemical Etching显示文摘Defects engineering is an efficient strategy to enhance the performance of electrode materials by modulating the local electronic structure but usually requires costly and complicated processing.Here,an electrochemical reduction etching method has been developed for controllable tailoring of the cationic defects in iron-based oxides under mild conditions.The optimized defective spinel-type iron nickel oxide exhibits an overpotential as low as 270 mV at 10 mA cm−2 and a Tafel slope of only 33.8 mV dec−1 for the oxygen evolution reaction(OER),outperforming the benchmark RuO2 and pristine oxide.Experiments and theoretical calculations reveal that Fe vacancies can enhance Ni–O covalency,increase the density of active sites,and optimize the surface electronic structure,which promote the water adsorption/activation and moderate oxygen intermediate species adsorption,thus significantly enhancing OER activity.This work provides a promising approach to create cation deficiency and mechanistic insight to understand the vacancy-induced enhancement of oxygen electrocatalysis. | Xiang Chen Meng Yu Zhenhua Yan Weiyi Guo Guilan Fan Youxuan Ni Jiuding Liu Wei Zhang Wei Xie Fangyi Cheng Jun Chen | 2021 | CCS Chemistry2021，3，1： | 1 |
| 3 | Selective nitrogen doping on carbon cloth to enhance the performance of zinc anode显示文摘Metallic zinc is attractive anode material of rechargeable aqueous Zn-based batteries due to its ambient stability,high volumetric capacity,and abundant reserves.Nonetheless,Zn anodes suffer from issues such as low coulombic efficiency(CE),large polarization and dendrite formation.Herein,uniform Zn electrodeposition is reported on carbon substrates by selective nitrogen doping.Combined experimental and theoretical investigations demonstrate that pyrrolic and pyridinic nitrogen doped in carbon play beneficial effect as zinc-philic sites to direct nucleation and growth of metallic Zn,while negligible effect is observed for graphite nitrogen in Zn plating.The carbon cloth with modified amount of doped pyrrolic and pyridinic nitrogen stabilizes Zn plating/stripping with 99.3%CE after 300 cycles and significantly increases the deliverable capacity at high depth of charge and discharge compared to undoped carbon substrate and Zn foil.This work provides a better understanding of heteroatom doping effect in design and preparation of stable 3 D carbon-supported zinc anode. | Lei Wang Guilan Fan Jiuding Liu Le Zhang Meng Yu Zhenhua Yan Fangyi Cheng | 2021 | Chinese Chemical Letters2021，32，3： | 1 |
| 4 | A TRAIL-BLAZER'S FOOTPRINTS ——A biographic sketch of CAS member Li Yiyi显示文摘People will never forget a scene at the First National Conference of Model Workers held in 1959,when the No.1 blast furnace of the No.1 Steelworks under the Benxi Iron & Steel Corporation was named a national standard bearer of the Red Flag,with its productivity ratio having won the national championship.The story was reported by the People’s Daily,Soviet Women’s Journal and Benxi Daily.As the young leader of the cited team of furnacemen, Li Yiyi became known to all. Time flies by and 34 years have elapsed since then. | Wang Zuoming & Fan Guilan(Shenyang Institute of Metal Research, CAS) | 1996 | Bulletin of the Chinese Academy of Sciences1996，10，3： | 0 |
| 5 | Additive manufacturing of Ti-6Al-4V alloy by hybrid plasma-arc deposition and microrolling:Grain morphology,microstructure,and tensile properties显示文摘To address the problems of coarse columnar grains,inhomogeneous microstructure,and anisotropic mechanical properties of Ti-6Al-4V manufactured by wire and arc additive manufacturing(WAAM)and hybrid additive manufacturing with plasma-arc deposition,synchronous microrolling(HDMR)was examined in this study.HDMR leads to significant grain refinement and isotropy improvement.Unrolled additive manufacturing alloys show typical columnar grains,while the microrolled ones show a transition from columnar to equiaxed grains with the fraction depending on the microrolling force.The microrolling-induced formation of equiaxed grains is caused by both dendrite fragmentation and priorβrecrystallization in the subsequent deposition.Interestingly,the rolling force required for good grain refinement in HDMR is much lower than that in WAAM with subsequent cold rolling.Microstructure characteristics are present near the grain boundaries due to the recrystallizedαlamellae distribution.The width of the basketweaveαlamellae decreases with the increasing microrolling force.The yield strength and ultimate tensile strength of HDMR samples increase with a decrease in elongation anisotropy.This study shows that HDMR can effectively refine grains and improve the tensile properties of titanium alloys,providing a broad prospect for the rapid formation of large titanium alloy parts. | CHENG Kui ZHANG MingBo SONG Hao LIU XinWang FAN ZiTian WANG GuiLan ZHANG HaiOu | 2022 | Science China(Technological Sciences)2022，65，4： | 0 |
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