Rationally design of 2D branched Ni(OH)2/MnO2 hybrid hierarchical architecture on Ni foam for high performance supercapacitors

Manganese oxides supported on ACFN by a one‐step redox method for the low‐temperature NOx reduction with NH3: effect of acid addition

“…Among all MnO 2 /ACF N samples, the MnO 2 /ACF N (CH 3 COOH) catalyst showed maximum specific surface area (979.9 m 2 g −1 ) and total pore volume (0.50 cm 3 g −1 ) larger than those for MnO 2 /ACF N (HNO 3 ) (954.5 m 2 g −1 , 0.49 cm 3 g −1 ) and MnO 2 /ACF N (HCl) (851.4 m 2 g −1 , 0.42 cm 3 g −1 ). The exposed ACF N and the flaked MnO 2 of 3D growth were the main factors affecting the specific surface area of the catalyst . The changing trend of specific surface area and pore volume was proportional to the catalytic performance of catalysts [Fig.…”

“…The exposed ACF N and the flaked MnO 2 of 3D growth were the main factors affecting the specific surface area of the catalyst. 19 The changing trend of specific surface area and pore volume was proportional to the catalytic performance of catalysts [ Fig. 2(a)].…”

Ultrasensitive Detection of a Variety of Analytical Targets Based on a Functionalized Low‐Resistance AuNPs/β‐Ni(OH)2 Nanosheets/Ni Foam Sensing Platform

“…Further characteristics of Ni(OH) 2 NS were uncovered by transmission electron microscopy (TEM), high‐resolution TEM (HRTEM), and selected area electron diffraction (SAED). The speculated hexagonal crystal nanostructure accorded well with the widely reported morphology of disordered Ni(OH) 2 NS14,17b,18 (Figure S5a, Supporting Information) and the above SEM image (Figure b). The layered structures at the edge of Ni(OH) 2 NS and the lattice fringes of 0.16 and 0.27 nm corresponding to different types of planes of single crystal HCP Ni(OH) 2 nanostructure were observed (Figure S5b,c, Supporting Information).…”

“…The homodisperse of AuNPs on the β‐Ni(OH) 2 NS was attributed to the following reasons: i) medium chain length of PVP‐K30 was added into the electrolyte to improve the nanoparticle formation rate, thus avoiding reunion and deposition as a gold film; ii) 2D disordered β‐Ni(OH) 2 NS physically blocked the reunion of nanoparticles; and iii) a platinum foil functioned as counter cathode during the electrodeposition process, which favored the formation of AuNPs considering the difference in radius and lattice constants for Pt (3.92 Å) and Au (4.08 Å) (the lattice mismatch between Pt and Au was as high as 4.08%) . As further uncovered by HRTEM (Figure b), the measured lattice fringes of 0.203 and 0.23 nm in the dark region were clearly visible, consistent with the (200) and (111) planes of Au (JCPDs, 04–0784), while the measured lattice fringes of 0.26 and 0.22 nm in the light gray region agreed well with the (100) and (002) planes of β‐Ni(OH) 2 (JCPDs, 14–0117), respectively 17b. Moreover, polycrystalline diffraction rings being ascribed to the Au (111) and β‐Ni(OH) 2 (100) planes were also revealed by the SAED (inset in Figure b), which was in agreement with the XRD pattern described above.…”

“…Direct growth of NS on Ni foam as a binder‐free electrode shows high performance in the field of sensing and energy storage . We have demonstrated in situ electrochemical corrosion of Ni foam to form Ni(OH) 2 flakes under hydrothermal conditions in the nickel salts‐ and additives‐free distilled water .…”