Molybdenum anode: a novel electrode for enhanced power generation in microbial fuel cells, identified via extensive screening of metal electrodes

Yamashita, Takahiro; Yokoyama, Hiroshi

doi:10.1186/s13068-018-1046-7

Biotechnology for Biofuels and Bioproducts

Table 2 Results of the screening of metal and oxidized-metal anodes

From: Molybdenum anode: a novel electrode for enhanced power generation in microbial fuel cells, identified via extensive screening of metal electrodes

Base metal	Anode	Maximum power density (mW/m²)				Current productivity (A/m²)^a
Base metal	Anode	Reactor 1	Reactor 2	Reactor 3	Average ± SD	Reactor 1	Reactor 2	Reactor 3	Average ± SD
Al	No treatment	140	269	190	200 ± 65	0.53	0.80	0.58	0.64 ± 0.14
	EO_acid-Al	141	207		174	0.43	0.46		0.45
	HT-Al	0.01	0.02		0	0.00	0.00		0.00
Ti	No treatment	28	4		16	0.02	0.05		0.04
	EO_acid-Ti	2	5		4	0.01	0.02		0.02
	FO-Ti	162	90		126	0.59	0.38		0.49
Fe	No treatment	178	186		182	0.39	0.70		0.55
	EO_alk-Fe	134	219		177	0.38	0.81		0.60
	FO-Fe	289	261	278	276 ± 14	1.01	0.91	1.05	0.99 ± 0.07
Ni	No treatment	165	130		148	0.43	0.41		0.42
	EO_acid-Ni	142	11		77	0.11	0.01		0.06
	EO_alk-Ni	120	131		126	0.08	0.27		0.18
	FO-Ni	162	110		136	0.42	0.21		0.32
Cu	No treatment	5	9		7	0.00	0.00		0.00
	EO_acid-Cu	26	14		20	0.00	0.00		0.00
	FO-Cu	39	23		31	0.09	0.00		0.05
Zn	No treatment	192	156		174	0.16	0.28		0.22
	EO_alk-Zn	120	152		136	0.18	0.18		0.18
	HT-Zn	160	88		124	0.36	0.08		0.22
Zr	No treatment	73	55		64	0.21	0.18		0.20
	EO_alk-Zr	16	9		13	0.04	0.02		0.03
	FO-Zr	7	3		5	0.03	0.13		0.08
Nb	No treatment	1.3	0.8		1	0.01	0.01		0.01
	EO_acid-Nb	0.4	0.5		0	0.01	0.00		0.01
	FO-Nb	68	111		90	0.17	0.27		0.22
Mo	No treatment	397	269	366	344 ± 67	2.15	1.08	1.76	1.66 ± 0.54
	EO_acid-Mo	373	265	331	323 ± 54	1.76	1.13	1.50	1.46 ± 0.32
	EO_alk-Mo	293	312	315	307 ± 12	0.93	1.09	1.40	1.14 ± 0.24
	FO-Mo	209	295	279	261 ± 46	0.67	1.09	0.96	0.91 ± 0.22
Ag	No treatment	71	135		103	0.20	0.14		0.17
	EO_acid-Ag	196	90		143	0.59	0.35		0.47
	EO_alk-Ag	198	242		220	0.60	0.85		0.73
	HT-Ag	238	218		228	0.49	0.59		0.54
In	No treatment	204	209		207	0.57	0.53		0.55
In	EO_acid-In	195	208		202	0.47	0.63		0.55
Sn	No treatment	279	183	265	242 ± 52	1.15	0.87	1.01	1.01 ± 0.14
	EO_acid-Sn	198	247	245	230 ± 28	0.55	1.03	0.84	0.81 ± 0.24
	EO_alk-Sn	287	171	286	248 ± 67	1.19	1.18	1.10	1.16 ± 0.05
	HT-Sn	259	238	171	223 ± 46	0.95	0.88	0.72	0.85 ± 0.12
Ta	No treatment	5	2		4	0.03	0.01		0.02
Ta	EO_acid-Ta	0	1		1	0.00	0.01		0.01
W	No treatment	73	72		73	0.00	0.00		0.00
	EO_acid-W	68	73		71	0.00	0.00		0.00
	EO_alk-W	77	71		74	0.00	0.09		0.05
	FO-W	253	293	288	278 ± 22	1.09	0.62	1.03	0.91 ± 0.26

^aCurrent generation of the metal anodes at − 0.3 V (vs. Ag/AgCl) in a potentiostatic test

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