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You searched for: Journal name Chemical communications Remove constraint Journal name: Chemical communications Subject term ammonia Remove constraint Subject term: ammonia Subject term catalysts Remove constraint Subject term: catalysts Subject term oxygen Remove constraint Subject term: oxygen Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
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1. A TiO₂₋ₓ nanobelt array with oxygen vacancies: an efficient electrocatalyst toward nitrite conversion to ammonia

Author:
Donglin Zhao; Jie Liang; Jun Li; Longcheng Zhang; Kai Dong; Luchao Yue; Yongsong Luo; Yuchun Ren; Qian Liu; Mohamed S. Hamdy; Quan Li; Qingquan Kong; Xuping Sun
Source:
Chemical communications 2022 v.58 no.22 pp. 3669-3672
ISSN:
1364-548X
Subject:
ammonia; catalysts; catalytic activity; durability; nitrites; oxygen; titanium
Abstract:
... Electrocatalytic nitrite reduction not only holds significant potential in the control of nitrite contamination in the natural environment, but also is an attractive approach for sustainable ammonia synthesis. In this communication, we report that a TiO₂₋ₓ nanobelt array with oxygen vacancies on a titanium plate is able to convert nitrite into ammonia with a high faradaic efficiency of 92.7% and a ...
DOI:
10.1039/d2cc00856d

2. Boosting electrochemical nitrite–ammonia conversion properties by a Cu foam@Cu₂O catalyst

Author:
Qiuyue Chen; Xuguang An; Qian Liu; Xiaoqiang Wu; Lisi Xie; Jing Zhang; Weitang Yao; Mohamed S. Hamdy; Qingquan Kong; Xuping Sun
Source:
Chemical communications 2022 v.58 no.4 pp. 517-520
ISSN:
1364-548X
Subject:
ammonia; catalysts; density functional theory; electrochemistry; electrosynthesis; foams; oxygen; wastewater treatment
Abstract:
... Electrocatalytic reduction of nitrite (NO₂⁻) to ammonia (NH₃) can simultaneously achieve wastewater treatment and ammonia production, but it needs efficient catalysts. Herein, Cu₂O particles self-supported on Cu foam with enriched oxygen vacancies are developed to enable selective NO₂⁻ reduction to NH₃, exhibiting a maximum NH₃ yield rate of 7510.73 μg h⁻¹ cm⁻² and high faradaic efficiency of 94.2 ...
DOI:
10.1039/d1cc06215h

3. An oxygen-coordinated molybdenum single atom catalyst for efficient electrosynthesis of ammonia

Author:
Jing Geng; Shengbo Zhang; Hui Xu; Guozhong Wang; Haimin Zhang
Source:
Chemical communications 2021 v.57 no.44 pp. 5410-5413
ISSN:
1364-548X
Subject:
activated carbon; ammonia; catalysts; durability; electrochemistry; electrolytes; electrosynthesis; molybdenum; nitrogen; oxygen
Abstract:
... Electrochemical nitrogen (N₂) reduction has been regarded as a promising strategy for artificial ammonia (NH₃) production under ambient conditions. Herein, we report the fabrication of molybdenum (Mo) single atoms anchored on activated carbon (Mo-SAs/AC) for the electrochemical N₂ reduction to NH₃. The surface-rich oxygen functional groups of activated carbon can effectively capture the Mo precurs ...
DOI:
10.1039/d1cc01455b

4. Biomass-derived oxygen-doped hollow carbon microtubes for electrocatalytic N₂-to-NH₃ fixation under ambient conditions

Author:
Tengteng Wu; Peipei Li; Huanbo Wang; Runbo Zhao; Qiang Zhou; Wenhan Kong; Meiling Liu; Youyu Zhang; Xuping Sun; Feng (Frank) Gong
Source:
Chemical communications 2019 v.55 no.18 pp. 2684-2687
ISSN:
1364-548X
Subject:
ammonia; carbon; catalysts; chemical reduction; electrodes; hydrochloric acid; hydrogen; kapok; nitrogen; oxygen
Abstract:
... Electrocatalytic N₂ reduction as an alternative approach to the energy-intensive and large CO₂-producing Haber–Bosch process for NH₃ synthesis under mild conditions has attracted extensive attention. Current research efforts on N₂ reduction have mainly focused on metal-based catalysts, but metal-free alternatives can avoid the issue of metal ion release. In this work, oxygen-doped hollow carbon mi ...
DOI:
10.1039/c8cc09867k

5. Ammonium formate decomposition over Au/TiO₂: a unique case of preferential selectivity against NH₃ oxidation

Author:
Manasa Sridhar; Daniel Peitz; Jeroen Anton van Bokhoven; Oliver Kröcher
Source:
Chemical communications 2014 v.50 no.53 pp. 6998-7000
ISSN:
1364-548X
Subject:
ammonia; ammonium; carbon dioxide; catalysts; formates; gold; oxidation; oxygen; titanium dioxide
Abstract:
... The unique selectivity of Au/TiO₂ for converting ammonium formate to CO₂ in the presence of excess O₂ and H₂O without oxidising NH₃ up to 300 °C is reported. The catalyst is highly stable and selective even after severe hydrothermal aging. ...
DOI:
10.1039/c4cc00196f

6. Tungsten nitride nanocrystals on nitrogen-doped carbon black as efficient electrocatalysts for oxygen reduction reactions

Author:
Youzhen Dong; Jinghong Li
Source:
Chemical communications 2014 v.51 no.3 pp. 572-575
ISSN:
1364-548X
Subject:
ammonia; annealing; catalysts; chemical reactions; electrochemistry; methanol; nanocrystals; nanoparticles; nitrides; oxygen; platinum; soot; tungsten
Abstract:
... The direct synthesis of tungsten nitride (WN) nanoparticles on nitrogen-doped carbon black (N-carbon black) was achieved through facile nucleation and growth of WN nanoparticles on simultaneously generated N-carbon black under ammonia annealing. As a noble-metal-free catalyst, the WN/N-carbon black hybrid exhibited excellent performance in ORR, coupled with superior methanol tolerance and long-ter ...
DOI:
10.1039/c4cc07137a

7. Unique reactivity in Pt/CNT catalyzed hydrolytic dehydrogenation of ammonia borane

Author:
Wenyao Chen; Jian Ji; Xuezhi Duan; Gang Qian; Ping Li; Xinggui Zhou; De Chen; Weikang Yuan
Source:
Chemical communications 2014 v.50 no.17 pp. 2142-2144
ISSN:
1364-548X
Subject:
ammonia; catalysts; catalytic activity; dehydrogenation; hydrogen production; nanomaterials; oxidation; oxygen; particle size; texture
Abstract:
... We demonstrate an unprecedented H₂ generation activity in the hydrolytic dehydrogenation of ammonia borane over acid oxidation- and subsequent high temperature-treated CNT immobilized Pt nanocatalysts to combine the merits of defect-rich and oxygen group-deficient surfaces and unique textural properties of supports as well as optimum particle size of Pt. ...
DOI:
10.1039/c3cc48027e

8. Copper/TEMPO catalysed synthesis of nitriles from aldehydes or alcohols using aqueous ammonia and with air as the oxidant

Author:
Laura M. Dornan; Qun Cao; James C. A. FlanaganCurrent address: Department of Chemistry, Stanford University, Stanford, CA 94305, USA.; James J. CrawfordCurrent address: Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, USA.; Matthew J. Cook; Mark J. Muldoon
Source:
Chemical communications 2013 v.49 no.54 pp. 6030-6032
ISSN:
1364-548X
Subject:
air; alcohols; aldehydes; ammonia; catalysts; catalytic activity; chemical communication; chemical reactions; nitriles; oxidants; oxygen; temperature
Abstract:
... Copper/TEMPO catalysts can be used to prepare nitriles from aldehydes or alcohols using aqueous ammonia. Readily accessible methods were developed that enable standard glassware to be used with air as the source of O₂. It was further shown that, at higher temperatures in a pressurised reactor under limiting oxygen conditions (8% O₂), catalyst loadings of 1 mol% could be employed. ...
DOI:
10.1039/c3cc42231c

9. NiO–polyoxometalate nanocomposites as efficient catalysts for the oxidative dehydrogenation of propane and isobutane

Author:
Qinghong Zhang; Chuanjing Cao; Ting Xu; Miao Sun; Jizhe Zhang; Ye Wang; Huilin Wan
Source:
Chemical communications 2009 v. no.17 pp. 2376-2378
ISSN:
1364-548X
Subject:
adsorption; ammonia; butanes; catalysts; catalytic activity; chemical communication; dehydrogenation; nanocomposites; nickel oxide; oxygen; particle size; propane
Abstract:
... Novel nanocomposites of NiO and polyoxometalate (Cs₂.₅H₀.₅PMo₁₂O₄₀) with particle sizes in the range of 5–10 nm showed exceptional oxygen and ammonia adsorption capabilities, and the nanocomposites catalyzed the oxidative dehydrogenation of propane and isobutane efficiently under mild conditions. ...
DOI:
10.1039/b823369a

10. Selective oxidation of benzene to phenol with molecular oxygen on rhenium/zeolite catalysts

Author:
Toshiaki Kusakari; Takehiko Sasaki; Yasuhiro Iwasawa
Source:
Chemical communications 2004 v. no.8 pp. 992-993
ISSN:
1364-548X
Subject:
ammonia; benzene; catalysts; oxidation; oxygen; phenol; rhenium; zeolites
Abstract:
... Zeolite-supported rhenium catalysts are active for selective oxidation of benzene with molecular oxygen, where coexisting ammonia is prerequisite to the direct phenol synthesis. ...
DOI:
10.1039/b401373e

11. In situ ammonia generation as a strategy for catalytic NOₓ reduction under oxygen rich conditions

Author:
Norman Macleod; Richard M. Lambert
Source:
Chemical communications 2003 v. no.11 pp. 1300-1301
ISSN:
1364-548X
Subject:
aluminum oxide; ammonia; catalysts; catalytic activity; hydrolysis; nitrogen oxides; oxygen; palladium
Abstract:
... Under highly oxygen rich conditions palladium/alumina catalysts exhibit strongly enhanced NOₓ reduction activity in the presence of CO∶H₂ mixtures due to in situ generation of ammonia via the formation and subsequent hydrolysis of isocyanate (NCO) species. ...
DOI:
10.1039/b302959j