It is urgently required to develop highly efficient and stable bifunctional non‐noble metal electrocatalysts for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for water splitting. In this study, a facile electrospinning followed by a post‐carbonization treatment to synthesize nitrogen‐doped carbon nanofibers (NCNFs) integrated with Ni and Mo2C nanoparticles (Ni/Mo2C‐NCNFs) as water splitting electrocatalysts is developed. Owing to the strong hydrogen binding energy on Mo2C and high electrical conductivity of Ni, synergetic effect between Ni and Mo2C nanoparticles significantly promote both HER and OER activities. The optimized hybrid (Ni/Mo2C(1:2)‐NCNFs) delivers low overpotentials of 143 mV for HER and 288 mV for OER at a current density of 10 mA cm−2. An alkaline electrolyzer with Ni/Mo2C(1:2)‐NCNFs as catalysts for both anode and cathode exhibits a current density of 10 mA cm−2 at a voltage of 1.64 V, which is only 0.07 V larger than the benchmark of Pt/C‐RuO2 electrodes. In addition, an outstanding long‐term durability during 100 h testing without obvious degradation is achieved, which is superior to most of the noble‐metal‐free electrocatalysts reported to date. This work provides a simple and effective approach for the preparation of low‐cost and high‐performance bifunctional electrocatalysts for efficient overall water splitting.

Developing high‐performance, low‐cost, and robust bifunctional electrocatalysts for overall water splitting is extremely indispensable and challenging. It is a promising strategy to couple highly active precious metals with transition metals as efficient electrocatalysts, which can not only effectively reduce the cost of the preparation procedure, but also greatly improve the performance of catalysts through a synergistic effect. Herein, Ru and Ni nanoparticles embedded within nitrogen‐doped carbon nanofibers (RuNi‐NCNFs) are synthesized via a simple electrospinning technology with a subsequent carbonization process. The as‐formed RuNi‐NCNFs represent excellent Pt‐like electrocatalytic activity for the hydrogen evolution reaction (HER) in both alkaline and acidic conditions. Furthermore, the RuNi‐NCNFs also exhibit an outstanding oxygen evolution reaction (OER) activity with an overpotential of 290 mV to achieve a current density of 10 mA cm−2 in alkaline electrolyte. Strikingly, owing to both the HER and OER performance, an electrolyzer with RuNi‐NCNFs as both the anode and cathode catalysts requires only a cell voltage of 1.564 V to drive a current density of 10 mA cm−2 in an alkaline medium, which is lower than the benchmark of Pt/C||RuO2 electrodes. This study opens a novel avenue toward the exploration of high efficient but low‐cost electrocatalysts for overall water splitting.

Nowdays, electrocatalytic water splitting has been regarded as one of the most efficient means to approach the urgent energy crisis and environmental issues. However, to speed up the electrocatalytic conversion efficiency of their half reactions including hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), electrocatalysts are usually essential to reduce their kinetic energy barriers. Electrospun nanomaterials possess a unique one‐dimensional structure for outstanding electron and mass transportation, large specific surface area, and the possibilities of flexibility with the porous feature, which are good candidates as efficient electrocatalysts for water splitting. In this review, we focus on the recent research progress on the electrospun nanomaterials‐based electrocatalysts for HER, OER, and overall water splitting reaction. Specifically, the insights of the influence of the electronic modulation and interface engineering of these electrocatalysts on their electrocatalytic activities will be deeply discussed and highlighted. Furthermore, the challenges and development opportunities of the electrospun nanomaterials‐based electrocatalysts for water splitting are featured. Based on the achievements of the significantly enhanced performance from the electronic modulation and interface engineering of these electrocatalysts, full utilization of these materials for practical energy conversion is anticipated.

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The cover representing article number https://doi.org/10.1002/aenm.201803185, by Xiaofeng Lu and co‐workers illustrates the fabrication of carbon nanofibers integrated with Ni and Mo2C nanoparticles as water splitting electrocatalysts for both HER and OER. An alkaline electrolyzer with the electrocatalysts for both anode and cathode is constructed and shows an excellent electrocatalytic activity and stability, which are expected to lead to promising applications in efficient energy storage and conversion.

The study aims to evaluate the effectiveness of different durations of aerobic exercise on hypertensive patients. Four electronic databases (PubMed, Embase, Cochrane Library, and Web of Science) were searched from their inception until July 2018. English publications and randomized controlled trials involving aerobic exercise treatment for hypertensive population were included. Two reviewers independently extracted the data. The Cochrane's Risk of Bias tool was used to assess the quality of included studies. In this systematic review, a total of 14 articles were included, involving 860 participants. The quality of the included studies ranged from moderate to high. The results of the meta‐analysis showed that compared with the control group, significant effects of aerobic exercise were observed on reducing systolic blood pressure (SBP) (mean difference [MD] = −12.26 mm Hg, 95% confidence interval [CI] = −15.17 to −9.34, P < 0.05), diastolic blood pressure (DBP; MD = −6.12 mm Hg, 95% CI = −7.76 to −4.48, P < 0.05), and heart rate (MD = −4.96 bpm, 95% CI = −6.46 to −3.43, P < 0.05). In addition, significant reductions were observed in ambulatory DBP (MD = −4.90 mm Hg, 95% CI = −8.55 to −1.25, P < 0.05) and ambulatory SBP (MD = −8.77mm Hg, 95% CI = −13.97 to −3.57, P < 0.05). Therefore, aerobic exercise might be an effective treatment for blood pressure improvement in hypertensive patients. However, the effectiveness between the duration of different treatment needs to be well‐designed and rigorous studies will be required to verify the dataset.

Aims To assess the effectiveness of music therapy on the quality of life, anxiety, depression and pain of patients with cancer. Design Systematic review. Data Sources Five electronic databases were searched in September 2018 for randomized controlled trials evaluating music therapy for patients with cancer. Review Methods The quality of the studies was assessed using the risk of bias tool recommended by the Cochrane Handbook Version 5.1.0 and the Revman version 5.3 software was used to perform the meta‐analysis. The outcomes were overall quality of life, anxiety, depression and pain. Results A total of 19 trials evaluating 1,548 patients were included in this study, of which 765 were in the control group and 783 in the experimental group. Compared with standard care, music therapy can significantly increase the score of the overall quality of life in patients with cancer. In addition, music therapy was found to be more effective for decreasing the score of anxiety, depression and pain. Conclusion Music therapy can improve the overall quality of life of patients with cancer, with an observed optimal intervention duration of 1–2 months. Meanwhile, anxiety, depression and pain are improved as well. Nevertheless, high‐quality trials are still needed to further determine the effects of music intervention in supportive cancer care.

Background Irritable bowel syndrome (IBS) is a very common functional bowel disorder. However, the difference of depression and anxiety comorbidities among different IBS subtypes is still not well evaluated. This study aims to investigate the difference in the level and prevalence of depression and anxiety among healthy controls and patients with different subtypes of IBS. Methods PubMed, EMBASE and the Cochrane library were searched systematically until August 17, 2020. Studies that investigated depression and/or anxiety levels or prevalence among different IBS-subtype patients measured at baseline or the same point were included. Network meta-analysis was conducted to analyze standardized mean difference (SMD) of anxiety and depression levels, and single arm meta-analysis was performed for prevalence of anxiety and depression among different IBS subtypes. Results Eighteen studies involving 7095 participants were included. Network meta-analyses results showed healthy controls had a lower level of depression than IBS with mixed symptoms of constipation and diarrhea (IBS-M) [SMD =  − 1.57; 95% confidence interval (CI) − 2.21,  − 0.92], IBS with constipation (IBS-C) (SMD =  − 1.53; 95% CI − 2.13,  − 0.93) and IBS with diarrhea (IBS-D)(SMD =  − 1.41; 95% CI − 1.97,  − 0.85), while no significant difference was found between IBS unclassified (IBS-U) and healthy controls (SMD =  − 0.58; 95% CI  − 2.15, 1.00). There was also no significant difference in the level of depression among different IBS subtypes patients. The results of anxiety were similar to depression. Ranking probability showed that IBS-M was associated with the highest level of depression and anxiety symptoms, followed by IBS-C/IBS-D and IBS-U. Single-arm meta-analysis showed IBS-C had the highest prevalence of depression (38%) and anxiety (40%), followed by IBS-D, IBS-M and IBS-U. Conclusion The results indicated that IBS-M was more likely to be associated with a higher level of depression and anxiety, and the prevalence of depression and anxiety in IBS-C was highest. The psychological screening and appropriate psychotherapy are needed for patients with IBS-C, IBS-D and IBS-M instead of IBS-U.