Minimizing energy demand and environmental impact for sustainable NH3 and H2O2 production—A perspective on contributions from thermal, electro-, and photo-catalysis

[Display omitted] •O‒O bond remains intact in all selective H2O2 production processes.•Coating is a common strategy to suppress metal leaching and sintering.•NH3 synthesis is possible via Mars-van Krevelen mechanism of nitrides.•Electrides and hydrides are new classes of NH3 synthesis catalysts.•Ver...

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Bibliographic Details
Published in:Applied catalysis. A, General General, 2020-03, Vol.594, p.117419, Article 117419
Main Authors: Hargreaves, Justin S.J., Chung, Young-Min, Ahn, Wha-Seung, Hisatomi, Takashi, Domen, Kazunari, Kung, Mayfair C., Kung, Harold H.
Format: Article
Language:English
Subjects:
Ammonia
Ammonia synthesis
Catalysis
Catalyst selectivity
Catalyst stability
Decontamination
Electrocatalysis
Energy conservation
Energy consumption
Environmental impact
Hydrogen peroxide
Hydrogen peroxide synthesis
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Literature reviews
Photocatalysis
Production methods
Water purification
Water supply
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Summary:[Display omitted] •O‒O bond remains intact in all selective H2O2 production processes.•Coating is a common strategy to suppress metal leaching and sintering.•NH3 synthesis is possible via Mars-van Krevelen mechanism of nitrides.•Electrides and hydrides are new classes of NH3 synthesis catalysts.•Very limited cross-fertilization of knowledge among processes. There is an urgent need to provide adequate and sustainable supplies of water and food to satisfy the demand of an increasing population. Catalysis plays important roles in meeting these needs by facilitating the synthesis of hydrogen peroxide that is used in water decontamination and chemicals production, and ammonia that is used as fertilizer. However, these chemicals are currently produced with processes that are either very energy-intensive or environmentally unfriendly. This article offers the perspectives of the challenges and opportunities in the production of these chemicals, focusing on the roles of catalysis in more sustainable, alternative production methods that minimize energy consumption and environmental impact. While not intended to be a comprehensive review, the article provides a critical review of selected literature relevant to its objectives, discusses areas needed for further research, and potential new directions inspired by new developments in related fields. For each chemical, production by thermal, electro-, and photo-excited processes are discussed. Problems that are common to these approaches and their differences are identified and possible solutions suggested.
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2020.117419