01993nas a2200205   4500008004100000022001400041245012600055210006900181260000800250520124400258653001101502653002101513653002801534653001301562653002001575100002101595700002001616700002401636856012701660       2019                        eng d  a1864-563100aGlycine-induced electrodeposition of nanostructured cobalt hydroxide: a bifunctional catalyst for overall water splitting0 aGlycineinduced electrodeposition of nanostructured cobalt hydrox  cNOV3 a<p>Herein, an interconnected alpha-Co(OH)(2) structure with a network-like architecture was used as a bifunctional electrocatalyst for the overall water splitting reaction in alkaline medium. The complexing ability of glycine with a transition metal was exploited to form [Co(gly)(3)](-) dispersion at pH 10, which was used for the electrodeposition. High-resolution TEM, UV/Vis-diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy were used to confirm that the as-synthesized materials had an alpha-Co(OH)(2) phase. The electrocatalytic oxygen and hydrogen evolution activity of the glycine-coordinated alpha-Co(OH)(2) was found to be approximately 320 and 145 mV, respectively, at 10 mA cm(-2). The material required approximately 1.60 V (vs. reversible hydrogen electrode; RHE) to achieve the benchmark of 10 mA cm(-2) for overall water splitting with a mass activity of approximately 63.7 A g(-1) at 1.60 V (vs. RHE). The chronoamperometric response was measured to evidence the stability of the material for overall water splitting for up to 24 h. Characterization of the catalyst after the oxygen and hydrogen evolution reactions was performed by XPS and showed the presence of a Co-II/Co-III oxidation state.</p>
10acobalt10aElectrochemistry10aheterogeneous catalysis10aHydrogen10awater splitting1 aShilpa, Nagaraju1 aNadeema, Ayasha1 aKurungot, Sreekumar  uhttps://library.ncl.res.in/content/glycine-induced-electrodeposition-nanostructured-cobalt-hydroxide-bifunctional-catalyst02214nas a2200289   4500008004100000022001400041245009500055210006900150260000800219300000800227490000600235520133700241653001001578653001101588653001201599653002001611653001201631653001101643100001601654700002401670700001701694700002401711700001801735700002101753700002501774856012501799       2019                        eng d  a2073-434400aHigh-performing PGM-free AEMFC cathodes from carbon-supported cobalt ferrite nanoparticles0 aHighperforming PGMfree AEMFC cathodes from carbonsupported cobal  cMAR  a2640 v93 a<p>Efficient and durable non-precious metal electrocatalysts for the oxygen reduction reaction (ORR) are highly desirable for several electrochemical devices, including anion exchange membrane fuel cells (AEMFCs). Here, cobalt ferrite (CF) nanoparticles supported on Vulcan XC-72 carbon (CF-VC) were created through a facile, scalable solvothermal method. The nano-sized CF particles were spherical with a narrow particle size distribution. The CF-VC catalyst showed good ORR activity, possessing a half-wave potential of 0.71 V. Although the intrinsic activity of the CF-VC catalyst was not as high as some other platinum group metal (PGM)-free catalysts in the literature, where this catalyst really shined was in operating AEMFCs. When used as the cathode in a single cell 5 cm(-2) AEMFC, the CF-VC containing electrode was able to achieve a peak power density of 1350 mW cm(-2) (iR-corrected: 1660 mW cm(-2)) and a mass transport limited current density of more than 4 A cm(-2) operating on H-2/O-2. Operating on H-2/Air (CO2-free), the same cathode was able to achieve a peak power density of 670 mW cm(-2) (iR-corrected: 730 mW cm(-2)) and a mass transport limited current density of more than 2 A cm(-2). These peak power and achievable current densities are among the highest reported values in the literature to date.</p>
10aAEMFC10acobalt10aFerrite10ahigh-performing10anon-PGM10avulcan1 aPeng, Xiong1 aKashyap, Varchaswal1 aNg, Benjamin1 aKurungot, Sreekumar1 aWang, Lianqin1 aVarcoe, John, R.1 aMustain, William, E.  uhttps://library.ncl.res.in/content/high-performing-pgm-free-aemfc-cathodes-carbon-supported-cobalt-ferrite-nanoparticles