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| 1 | Exposed facet-controlled N_(2) electroreduction on distinct Pt3Fe nanostructures of nanocubes, nanorods and nanowires显示文摘Understanding the correlation between exposed surfaces and performances of controlled nanocatalysts can aid effective strategies to enhance electrocatalysis,but this is as yet unexplored for the nitrogen reduction reaction(NRR).Here,we first report controlled synthesis of well-defined Pt3Fe nanocrystals with tunable morphologies(nanocube,nanorod and nanowire)as ideal model electrocatalysts for investigating the NRR on different exposed facets.The detailed electrocatalytic studies reveal that the Pt3Fe nanocrystals exhibit shape-dependent NRR electrocatalysis.The optimized Pt3Fe nanowires bounded with high-index facets exhibit excellent selectivity(no N2H4 is detected),high activity with NH3 yield of 18.3μg h^-1mg^-1cat(0.52μg h^-1cm^-2ECSA;ECSA:electrochemical active surface area)and Faraday efficiency of 7.3%at-0.05 V versus reversible hydrogen electrode,outperforming the{200}facet-enclosed Pt3Fe nanocubes and{111}facet-enclosed Pt3Fe nanorods.They also show good stability with negligible activity change after five cycles.Density functional theory calculations reveal that,with high-indexed facet engineering,the Fe-3d band is an efficient d-d coupling correlation center for boosting the Pt 5d-electronic exchange and transfer activities towards the NRR. | Wu Tong Bolong Huang Pengtang Wang Qi Shao Xiaoqing Huang | 2021 | National Science Review2021，8，1： | 1 |
| 2 | One-dimensional iridium-based nanowires for efficient water electrooxidation and beyond显示文摘The sluggish reaction kinetics of oxygen evolution reaction(OER)has largely lowered the efficiency of electrochemical water splitting.Ir represents one of the state-of-the-art electrocatalysts for promoting OER especially in acidic electrolytes.However,it remains a formidable challenge to synthesize high-quality one-dimensional(1D)Ir-based nanostructures for improved electrocatalytic performance.Herein,a template-assisted synthesis method is reported wherein 1D porous Ir-Te nanowires(Ir-Te NWs)are synthesized with Te NWs serving as the template.The Ir-Te NWs exhibit highly enhanced OER performance compared to commercial IrO_(2) and Ir/C.In detail,the overpotentials to reach 10 mA cm^(-2) are 248 and 284 mV in 1 M KOH and 0.5 M H2S04,respectively,much lower than those of commercial catalysts.The Ir-Te NWs also show smaller Tafel slopes than commercial IrO_(2) and Ir/C,signifying faster reaction kinetics.Besides,much more durable OER activity can be maintained for Ir-Te NWs with negligible decay during 25 and 20 h stability tests in 1 M KOH and 0.5 M H_(2)SO_(4),respectively.Further analysis indicates that the significantly improved OER performance of Ir-Te NWs could be ascribed to the larger electrochemical surface area and smaller electrical resistance.More significantly,the templated synthesis of Ir-Te NWs can be facilely extended to the fabrication of other metal-Te NWs including Ru-Te,Rh-Te and Pt-Te NWs.The design and synthesis of 1D metal-based NWs in this work provide important inspiration for the synthesis of diversified 1D metallic nanostructures with distinctly enhanced catalytic performance and beyond. | Leigang Li Pengtang Wang Zifang Cheng Qi Shao Xiaoqing Huang | 2022 | Nano Research2022，15，2： | 1 |
| 3 | Boosting hydrogen production with ultralow working voltage by selenium vacancy‐enhanced ultrafine platinum–nickel nanowires显示文摘Defect engineering provides a highly potential way to yield exceptional catalytic performance.Herein,we first report the selenium(Se)vacanciesdecorated ultrafine platinum-nickel(PtNi‐Sev)nanowires,as a bifunctional catalyst for the hydrogen evolution reaction(HER)and methanol oxidation reaction(MOR).The optimized PtNi‐Sev exhibits obvious enhancement for HER and MOR compared to PtNi nanowires.It displays merely an overpotential of 18.8 mV for alkaline HER and the outstanding MOR performance(3.51 A/mgPt).When applying in one symmetric overall water splitting electrolyzer coupling with HER and MOR,an ultralow working voltage of 0.637 V with 100%Faraday efficiency for hydrogen production was achieved at the current density of 10 mA/cm^(2).Further investigations reveal that the weakened hydrogen binding energy,strong OH binding as well as relative weak CO binding are responsible for the improved HER and MOR activities. | Yu Jin Zhe Zhang Hao Yang Pengtang Wang Chenqi Shen Tao Cheng Xiaoqing Huang Qi Shao | 2022 | SmartMat2022，3，1： | 0 |
| 4 | Phase and structure modulating of bimetallic Cu/In nanoparticles realizes efficient electrosynthesis of syngas with wide CO/H_(2) ratios显示文摘Syngas(CO+H_(2))is the incredibly important feedstock for producing synthetic fuels and various value-added chemicals.CO_(2) electrochemical reduction to syngas is an environmental-friendly and sustainable approach,but still challenging to produce tunable syngas with a wide ratio of CO+H_(2).Herein,by modulating the structure and phase,we have successfully obtained a series of copper-indium(Cu-ln)catalysts,which are efficient for producing syngas with tunable CO+H_(2) ratios.A series of Culn bimetallic catalysts with different structures from hollow sphere to two-layer hollow sphere and different phases from CuO to CU_(2)O are developed.We find that the CO and H2 are the only gaseous products,in which the CCD/H_(2) ratios can be readily tuned from 1.2±0.1 to 9.0±1.5 by simply controlling the thermal annealing temperature.It also exhibits high durability during a 10-h test.The unique performance is attributed to the modulated In enrichment on the Cu surfaces during the CO_(2) reduction reaction,which causes the differences in binding energies for key reaction intermediates,thus resulting in the tunable composition of syngas.The present work emphasizes a simple yet efficient phase and structure modulating strategy for designing potential electrocatalysts for producing syngas with widely tunable CO+H_(2) ratios. | Chenqi Shen Pengtang Wang Leigang Li Xiaoqing Huang Qi Shao | 2022 | Nano Research2022，15，1： | 0 |
| 5 | Cu2O-Mediated Room Temperature Cyanation of Aryl Boronic Acids/Esters and TMSCN显示文摘为经由芳基 boronic 酸或酉旨和 TMSCN 的 Cu2O-catalyed 跨 coupling 的芳基 nitriles 的有效、可靠的合成的一个方法被介绍。大量底层装饰了由充满电子、缺乏,位地,很拥挤、易变的功能被容忍。而且,反应能在房间温度在温和条件下面继续。作为催化剂与便宜、容易地可得到、没有卤素的 Cu2O 的使用配对的这些优点为芳基 cyanations 使协议成为一种呼吁的选择。 | Yong Ye Yanhua Wang Pengtang Liu Fushe Han | 2013 | Chinese Journal of Chemistry2013，31，1： | 0 |
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