2013
DOI: 10.1039/c2cc38621f
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NiSe2 as an efficient electrocatalyst for a Pt-free counter electrode of dye-sensitized solar cells

Abstract: Nickel diselenide (NiSe(2)) has been synthesized and applied as a counter electrode (CE) of dye-sensitized solar cells (DSSCs) for the first time, which displays remarkable catalytic activity in the reduction of I(3)(-). The DSSC with a NiSe(2) CE produces a higher power conversion efficiency (8.69%) than that (8.04%) of the cell with a Pt CE under the same conditions. A new method for comparing the catalytic activity has also been proposed.

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Cited by 207 publications
(122 citation statements)
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References 26 publications
(26 reference statements)
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“…The Epp value is negatively correlated with the standard electrochemical rate constant of a redox reaction, which is an important parameter for comparing catalytic activities of different CEs. 23 The Epp values for CoMoS 4 -C (70 mV) and NiMoS 4 -C (76 mV) are much smaller than that for Pt CE (115 mV) (more information is provided in Table S3, ESI †). This is immediately responsible for the lower overpotential losses in the CoMoS 4 -C and NiMoS 4 -C CEs than in the Pt CE.…”
mentioning
confidence: 99%
“…The Epp value is negatively correlated with the standard electrochemical rate constant of a redox reaction, which is an important parameter for comparing catalytic activities of different CEs. 23 The Epp values for CoMoS 4 -C (70 mV) and NiMoS 4 -C (76 mV) are much smaller than that for Pt CE (115 mV) (more information is provided in Table S3, ESI †). This is immediately responsible for the lower overpotential losses in the CoMoS 4 -C and NiMoS 4 -C CEs than in the Pt CE.…”
mentioning
confidence: 99%
“…This work demonstrates that SPS is a powerful densification method in obtaining high quality polycrystalline materials. The high crystallinity and electrical conductivity for polycrystalline NiSe 2 may allow for potential applications in fields which require high electrical conductivity, such as for junction materials for thermoelectric applications [26], in solar cells [7], and for Li ion cells [8].…”
Section: Methodsmentioning
confidence: 99%
“…According to the Ni-Se phase diagram [5] three stable phases exist at room temperature, NiSe 2 , Ni 1Àx Se (x ¼ 0-0.15), and Ni 3 Se 2 , with physical properties that are dependent on composition and morphology [6]. Nickel selenide compounds have potential application in photovoltaics, energy storage, and electrocatalysis [7][8][9][10]. NiSe 2 forms in the pyrite (Pa3) structure and has been used as a conducting layer in solar cells and energy storage materials (NiSe 2 /Li cells, e.g.)…”
mentioning
confidence: 99%
“…In order to reduce the overall production cost, numerous attempts have been made to explore competent substitutes for Pt. The substitutes reported so far include carbonaceous materials [3], conducting polymers [4][5][6] and inorganic metal compounds such as oxide [7,8], sulfide, nitride [9][10][11], carbide [12][13][14] and selenide [15,16].…”
Section: Introductionmentioning
confidence: 99%