Nanostructured Intermetallic Nickel Silicide (Pre)Catalyst for Anodic Oxygen Evolution Reaction and Selective Dehydrogenation of Primary Amines

Indranil Mondal; J. Niklas Hausmann; Gonela VijaykumarStefan MebsHolger DauMatthias DriessPrashanth W. Menezes

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Nanostructured Intermetallic Nickel Silicide (Pre)Catalyst for Anodic Oxygen Evolution Reaction and Selective Dehydrogenation of Primary Amines

机译：Nanostructured Intermetallic Nickel Silicide (Pre)Catalyst for Anodic Oxygen Evolution Reaction and Selective Dehydrogenation of Primary Amines

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The development of novel earth-abundant metal-based catalysts to acceleratethe sluggish oxygen evolution reaction (OER) is crucial for the processof large-scale production of green hydrogen. To solve this bottleneck,herein, a simple one-pot colloidal approach is reported to yield crystallineintermetallic nickel silicide (Ni_2Si), which results in a promising precatalystfor anodic OER. Subsequently, an anodic-coupled electrosynthesis for theselective oxidation of organic amines (as sacrificial proton donating agents)to value-added organocyanides is established to boost the cathodic reaction.A partial transformation of the Ni2Si intermetallic precatalyst generates aporous nickel(oxy)hydroxide phase modified with oxidic silicon species asunequivocally demonstrated by a combination of quasi in situ Raman andX-ray absorption spectroscopy as well as ex situ methods. The activated formof the catalyst generates a geometric current density of 100 mA cm~(?2) at anoverpotential (η100) of 348 mV displaying long-term durability over a week andhigh efficiency in paired electrolysis.

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《Advanced energy materials》 |2022年第25期|2200269.1-2200269.10|共10页
作者
Indranil Mondal; J. Niklas Hausmann; Gonela VijaykumarStefan MebsHolger DauMatthias DriessPrashanth W. Menezes;
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Department of Chemistry: Metalorganics and Inorganic MaterialsTechnische Universitaet BerlinStrasse des 17 Juni 135, Sekr. C2, 10623 Berlin, Germany;

Fachbereich PhysikFreie Universitaet BerlinArnimallee 14, 14195 Berlin, Germany;

Department of Chemistry: Metalorganics and Inorganic MaterialsTechnische Universit?t BerlinStra?e des 17 Juni 135, Sekr. C2, 10623 Berlin, GermanyDepartment of Chemistry: Metalorganics and Inorganic MaterialsTechnische Universit?t BerlinStra?e des 17 Juni 135, Sekr. C2, 10623 Berlin, Germany,Materials Chemistry Group for Thin Film Catalysis – CatLabHelmholtz-Zentrum Berlin fuer Materialien und Ener;

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in situ spectroscopy; intermetallic; nickel silicide; oxygen evolution reaction; primary amines oxidation;

Nanostructured Intermetallic Nickel Silicide (Pre)Catalyst for Anodic Oxygen Evolution Reaction and Selective Dehydrogenation of Primary Amines

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