Transition-Metal Nanoparticle Catalysts Anchored on Carbon Supports via Short-Chain Alginate Linkers

Recent literature results have highlighted the role of small transition metal and intermetallic nanoparticles supported on graphene as catalysts for many key applications in energy and commodity chemicals industries. Specifically, metal nanoparticle catalysts down to sizes of 4 and even 1 (single atom catalysts) on graphene have been studied for the Oxygen Reduction Reaction (ORR). A recent study showed that 4-atom transition metal intermetallic nanoparticles (NP) on graphene (metal-decorated graphene (MDG)) even generate a predictive Volcano Plot for ORR activity. Initial results from that study were not completely explained, and an expanded analysis and discussion built from that work is presented in this manuscript. Specifically, in this new work, the original Volcano Plot for 4-atom MDG NP catalysts for the ORR is analyzed for its counter-intuitive thermodynamic inversion between the rate limiting steps of O* hydrogenation and OH* hydrogenation. The Volcano Plot is then further studied for dependence on solvent correction energy, system pH, and with an initial probe on the sensitivity of descriptor values on doping of the graphene support via B and N atoms. Recommendations for optimum 4-atom MDG NP catalyst operation for the ORR are provided, and directions for future work and study are provided.

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Highly Efficient Transition Metal Nanoparticle Catalysts in Aqueous Solutions

Angewandte Chemie International Edition ◽

10.1002/anie.201511305 ◽

2016 ◽

Vol 55 (9) ◽

pp. 3091-3095 ◽

Cited By ~ 95

Author(s):

Changlong Wang ◽

Roberto Ciganda ◽

Lionel Salmon ◽

Danijela Gregurec ◽

Joseba Irigoyen ◽

...

Keyword(s):

Transition Metal ◽

Aqueous Solutions ◽

Metal Nanoparticle ◽

Nanoparticle Catalysts ◽

Highly Efficient

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Transition metal nanoparticle catalysts in releasing hydrogen from the methanolysis of ammonia borane

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2019.04.125 ◽

2020 ◽

Vol 45 (14) ◽

pp. 7881-7891 ◽

Cited By ~ 9

Author(s):

Saim Özkar

Keyword(s):

Transition Metal ◽

Ammonia Borane ◽

Metal Nanoparticle ◽

Nanoparticle Catalysts

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Recent Advances in Metal Nanoparticle-catalyzed Coupling Reactions Assisted by Microwave Irradiation

Synthesis ◽

10.1055/a-1505-0916 ◽

2021 ◽

Author(s):

Makoto Sako ◽

Mitsuhiro Arisawa

Keyword(s):

Transition Metal ◽

Microwave Irradiation ◽

Bond Formation ◽

Short Review ◽

Metal Nanoparticle ◽

Coupling Reactions ◽

Nanoparticle Catalysts ◽

Microwave Assisted ◽

Recent Advances ◽

Metal Catalyzed

Transition-metal-catalyzed coupling reactions are some of the most important subjects in synthetic chemistry as they are reliable tools for carbon-carbon or carbon-heteroatom bond formation. This Short Review focuses on recent advances in microwave-assisted coupling reactions using transition-metal nanoparticle catalysts.

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Polymer-supported CuPd nanoalloy as a synergistic catalyst for electrocatalytic reduction of carbon dioxide to methane

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1522496112 ◽

2015 ◽

Vol 112 (52) ◽

pp. 15809-15814 ◽

Cited By ~ 77

Author(s):

Sheng Zhang ◽

Peng Kang ◽

Mohammed Bakir ◽

Alexander M. Lapides ◽

Christopher J. Dares ◽

...

Keyword(s):

State Of The Art ◽

Metal Nanoparticle ◽

Local Concentration ◽

Electrocatalytic Reduction ◽

Catalytic Current ◽

Faradaic Efficiency ◽

Nanoparticle Catalysts ◽

Ultrafine Metal ◽

Current Densities ◽

Energy Strategies

Developing sustainable energy strategies based on CO2 reduction is an increasingly important issue given the world’s continued reliance on hydrocarbon fuels and the rise in CO2 concentrations in the atmosphere. An important option is electrochemical or photoelectrochemical CO2 reduction to carbon fuels. We describe here an electrodeposition strategy for preparing highly dispersed, ultrafine metal nanoparticle catalysts on an electroactive polymeric film including nanoalloys of Cu and Pd. Compared with nanoCu catalysts, which are state-of-the-art catalysts for CO2 reduction to hydrocarbons, the bimetallic CuPd nanoalloy catalyst exhibits a greater than twofold enhancement in Faradaic efficiency for CO2 reduction to methane. The origin of the enhancement is suggested to arise from a synergistic reactivity interplay between Pd–H sites and Cu–CO sites during electrochemical CO2 reduction. The polymer substrate also appears to provide a basis for the local concentration of CO2 resulting in the enhancement of catalytic current densities by threefold. The procedure for preparation of the nanoalloy catalyst is straightforward and appears to be generally applicable to the preparation of catalytic electrodes for incorporation into electrolysis devices.

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