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Synthesis of Pt–Ni Alloy Nanocrystals with High-Index Facets and Enhanced Electrocatalytic Properties The shape-controlled synthesis of multicomponent metal nanocrystals (NCs) bounded by high-index facets (HIFs) is of significant importance in the design and synthesis of highactivity catalysts. We report herein the preparation of Pt–Ni alloy NCs by tuning their shape from concave-nanocubic (CNC) to nanocubic and hexoctahedral (HOH). Owing to the synergy of the HIFs and the electronic effect of the Pt–Ni alloy, the as-prepared CNC and HOH Pt–Ni alloy NCs exhibited excellent catalytic properties for the electrooxidation of methanol and formic acid, as well as for the oxygen reduction reaction (ORR). |

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具有高指數(shù)晶面及受增強(qiáng)電催化特性的鉑鎳合金納米晶體的制備 受高指數(shù)晶面束縛的多元金屬納米晶體的形狀控制合成技術(shù)在設(shè)計(jì)及合成高活性催化劑上具有重要意義。我們?cè)诖宋膱?bào)道了鉑鎳合金NCs的制備過(guò)程,利用了形狀調(diào)整使凹面納米立方變?yōu)榧{米立方及六八面體。由于HIFs的協(xié)同效應(yīng)以及鉑鎳合金的電子效應(yīng),以此法制備的CNC以及HOH型鉑鎳合金NCs在甲醇和甲酸的電解氧化反應(yīng)以及氧還原反應(yīng)中表現(xiàn)出極好的催化特性。 |
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