Formation of B-N-C Coordination to Stabilize the Exposed Active Nitrogen Atoms in g-C3N4 for Dramatically Enhanced Photocatalytic Ammonia Synthesis Performance

doi:10.1002/smll.201906880

	Formation of B-N-C Coordination to Stabilize the Exposed Active Nitrogen Atoms in g-C3N4 for Dramatically Enhanced Photocatalytic Ammonia Synthesis Performance
	Wang, Weikang 1,2; Zhou, Hongjian 1; Liu, Yanyan 1; Zhang, Shengbo 1,2; Zhang, Yunxia 1; Wang, Guozhong 1; Zhang, Haimin 1; Zhao, Huijun 1,3
刊名	SMALL
	2020-02-20
关键词	active N atoms ammonia synthesis B-N-C coordination boron-doped g-C3N4 N-2 reduction photocatalytic nitrogen reduction reaction (NRR)
ISSN号	1613-6810
DOI	10.1002/smll.201906880
通讯作者	Zhang, Haimin(zhanghm@issp.ac.cn) ; Zhao, Huijun(h.zhao@griffth.edu.au)
英文摘要	It is an important issue that exposed active nitrogen atoms (e.g., edge or amino N atoms) in graphitic carbon nitride (g-C3N4) could participate in ammonia (NH3) synthesis during the photocatalytic nitrogen reduction reaction (NRR). Herein, the experimental results in this work demonstrate that the exposed active N atoms in g-C3N4 nanosheets can indeed be hydrogenated and contribute to NH3 synthesis during the visible-light photocatalytic NRR. However, these exposed N atoms can be firmly stabilized through forming B-N-C coordination by means of B-doping in g-C3N4 nanosheets (BCN) with a B-doping content of 13.8 wt%. Moreover, the formed B-N-C coordination in g-C3N4 not only effectively enhances the visible-light harvesting and suppresses the recombination of photogenerated carriers in g-C3N4, but also acts as the catalytic active site for N-2 adsorption, activation, and hydrogenation. Consequently, the as-synthesized BCN exhibits high visible-light-driven photocatalytic NRR activity, affording an NH3 yield rate of 313.9 mu mol g(-1) h(-1), nearly 10 times of that for pristine g-C3N4. This work would be helpful for designing and developing high-efficiency metal-free NRR catalysts for visible-light-driven photocatalytic NH3 synthesis.
资助项目	National Natural Science Foundation of China[51872292] ; National Natural Science Foundation of China[51432009] ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China
WOS关键词	GRAPHITIC CARBON NITRIDE ; BORON-DOPED GRAPHENE ; CO2 REDUCTION ; N-2 FIXATION ; NANOSHEETS ; WATER
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000518146300001
资助机构	National Natural Science Foundation of China ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103865]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Haimin; Zhao, Huijun
作者单位	1.Chinese Acad Sci, Anhui Key Lab Nanomat & Nanotechnol, Ctr Environm & Energy Nanomat, CAS Ctr Excellence Nanosci,Inst Solid State Phys, Hefei 230031, Anhui, Peoples R China 2.Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Anhui, Peoples R China 3.Griffith Univ, Ctr Clean Environm & Energy, Gold Coast Campus, Nathan, Qld 4222, Australia
推荐引用方式 GB/T 7714	Wang, Weikang,Zhou, Hongjian,Liu, Yanyan,et al. Formation of B-N-C Coordination to Stabilize the Exposed Active Nitrogen Atoms in g-C3N4 for Dramatically Enhanced Photocatalytic Ammonia Synthesis Performance[J]. SMALL,2020.
APA	Wang, Weikang.,Zhou, Hongjian.,Liu, Yanyan.,Zhang, Shengbo.,Zhang, Yunxia.,...&Zhao, Huijun.(2020).Formation of B-N-C Coordination to Stabilize the Exposed Active Nitrogen Atoms in g-C3N4 for Dramatically Enhanced Photocatalytic Ammonia Synthesis Performance.SMALL.
MLA	Wang, Weikang,et al."Formation of B-N-C Coordination to Stabilize the Exposed Active Nitrogen Atoms in g-C3N4 for Dramatically Enhanced Photocatalytic Ammonia Synthesis Performance".SMALL (2020).