2020同步年報

Energy Science 061 Fig. 2 : Local structural analysis of D-IrTe 2 and DO-IrTe 2 HNS. (a) Normalized Ir L 3 -edge XANES profiles of DO-IrTe 2 and D-IrTe 2 HNS. The profiles of pristine IrTe 2 HNS, commercial Ir/C and IrO 2 are included as references. Normalized XANES profiles of (b) D-IrTe 2 HNS, (c) Ir/C, (d) DO-IrTe 2 HNS, and (e) IrO 2 at varied potential. The dotted lines in (b)–(e) represent the profiles obtained when the applied potential was decreased to the initial value. (f,g) k 3 -Weighted Fourier transforms of EXAFS profiles of DO-IrTe 2 HNS and D-IrTe 2 HNS. The profiles of bulk IrTe 2 , Ir/C, and rutile-type IrO 2 are included as references. k 3 -Weighted Fourier transforms of EXAFS profiles of (h) IrO 2 and (i) DO-IrTe 2 HNS at varied potentials. The vertical dashed lines indicate the Ir–O (grey) and Ir–Ir (blue) radial distances of IrO 2 and Ir/C, respectively. (j) The Ir–O distance in DO-IrTe 2 HNS and IrO 2 was deter- mined with EXAFS analysis data as a function of the applied potential. [Reproduced from Ref. 2]