Erratum to:Polypyrrole@NiCo hybrid nanotube arrays as high performance electrocatalyst for hydrogen evolution reaction in alkaline solution

Figure 2(b)on Page 476:It has come to our attention that the data of(i)Co NTAs in Fig.2(b)is not correct,because we imported the same group of data of PPy@NiCo HNTAs accidentally while plotting with Origin.The corrected Fig.2(b)is shown below.The data analysis and conclusions are not affected by this unintentional error.The text on Page 474:The sentence of“Figures 2b(i)and 2b(ii)show Co 2p1/2 peak of NiCo NTAs negatively shifts-0.4 eV relative to that of Co NTAs”is not correct,and it should be revised as below:“Figures 2b(i)and 2b(ii)show Co 2p3/2 peak of NiCo NTAs negatively shifts-0.35 cV relative to that of Co NTAs.”