Top 20 most-cited articles^a.

No.	Articles	TC	PY	Research category
1	V. R. Stamenkovic29	2096	2007	PEMFC
2	B. Lim et al.30	1811	2009	PEMFC
3	M. Lefèvre et al.31	1512	2009	PEMFC
4	J. Greeley et al.32	1118	2009	PEMFC
5	G. Nagel et al.33	1083	2003	CSM
6	H. Liu et al.34	1017	2004	MFC
7	F. Wang et al.35	868	2002	PEMFC
8	E. J. Popczun et al.36	859	2013	HER
9	D. B. Levin et al.37	816	2004	PEMFC
10	P. J. Ferreira et al.38	781	2005	PEMFC
11	K. Schmidt-Rohr et al.39	706	2008	PEMFC
12	C. G. Van de Walle et al.40	666	2003	PEMFCb
13	J. H. Nam et al.41	627	2003	PEMFC
14	C. Wang et al.42	625	2004	PEMFC
15	P. Xing et al.43	622	2004	PEMFC
16	Z. H. Wang et al.44	609	2001	PEMFC
17	B. Logan et al.45	603	2007	MFC
18	S. Cheng et al.46	594	2006	MFC
19	S. M. Haile et al.47	591	2001	SAFC
20	C. Rice et al.48	537	2002	DFAFC

^aTC refers to total citations; PY refers to publishing year; PEMFC refers to proton exchange membrane fuel cell or polymer electrolyte membrane fuel cell; CSM refers to cation selective membrane; MFC refers to microbial fuel cell; SAFC refers to solid acid fuel cell; HER refers to hydrogen evolution reaction; DFAFC refers to direct formic acid fuel cell.

^bThe more direct research topic of this paper was hydrogen, understanding of which is important for PEMFC development.